How to Grow Weed at Home: The Complete 2026/2027 Step-by-Step Guide (Seed to Harvest)

Last updated: October 25, 2026 (2026/2027 edition)

Quick answer: Where it’s legal, you can grow weed at home in about 4 months. Germinate a feminized photoperiod seed in premoistened soil, veg for 6 weeks under 18 hours of light, then switch to 12 hours and flower for 8 to 11 weeks. Feed with General Hydroponics Flora Trio plus CalMag, pH your water to 6.2 to 6.5, and harvest when most trichomes are milky with a few amber. Then dry and cure the buds.

Want this on your phone while you grow? Use the interactive HWGROW grow cheat sheet for every week’s settings and how-to videos, and the feed calculator for exact ml per plant.

Is it legal to grow weed at home?

It depends on where you live, so check before you buy anything. Home cultivation is legal in some US states and countries, restricted in others, and still a crime in many places. Federal law in the US still treats cannabis as illegal, even where states allow it.

Before you start, confirm three things for your location:

• Age: most places that allow home growing require you to be 21 or older (18 for medical patients in some places).
• Plant limits: many states cap the number of plants per adult or per household, and some count only mature plants.
• Conditions: rules may require the plants to be out of public view, locked, or indoors, and some states require a medical card.

This guide is for adults growing where it is legal. Laws change, so read your state’s current statute or official cannabis agency page. See which US states allow home growing.

What equipment you need (and what to buy first)

A grow tent with a good LED light gives you the most control and the best quality. You can grow without one, but light, temperature and humidity will swing and your results will too. If your budget is limited, spend in this order: grow light, then genetics, then everything else.

For full setups by plant count, watts and fans, see the tent configuration guide. Everything else is listed in everything used in this tutorial. Picking a light? Read how to pick an LED grow light.

Choosing a light. Look at the diodes (Samsung diodes were discontinued at the end of 2025, and Bridgelux currently seems to be dominant), a continuous dimmer, a warranty of at least two years, and how much heat it gives off. Heat matters most if you grow through hot summers. Then check non-sponsored grow journals to see real harvests from the light you’re considering. When you have a choice between a bar light and a panel, go with a bar light: the corners of the tent often get little or no light under a panel.

Keep it simple and save money. Used equipment from local marketplaces can cut costs a lot, though you usually lose the warranty. Try to avoid bringing lights closer than 16 inches to the canopy, since intensity rises sharply as you get closer.

Some links on this site are affiliate links. They cost you nothing extra, and I only recommend gear I’d use myself. See tent configurations by plant count, watts and fans.

Which seeds to grow: feminized photoperiod

For your first grow, buy feminized photoperiod seeds. They almost always produce female plants, which are the ones that make buds, and you control when they flower by changing the light schedule.

• Feminized photoperiod: “photo” means light and “period” means time. The plant stays in vegetative growth under about 18 hours of light and starts flowering when you switch to 12. You decide how big it gets.
• Autoflowers: these flower on their own clock, regardless of light. They are not easier. I have witnessed too many first-time growers end up with small plants and low yields, so I advise against them. If you do run autos, hydro or coco is the recommended medium for large plants (see Maximizing Autoflowers).
• Regular seeds: about half become males, which make pollen instead of buds. You’d have to sex every plant and remove the males.

How to pick a strain and breeder. Note both the strain name and the breeder, because the same strain name from a different breeder is often completely different genetics. Look for strains that experienced growers have run more than once, and check grow journals. Don’t rely on the top search results alone, since companies that are good at SEO don’t always have the best genetics.

A note on hermaphrodites. Occasionally a female plant grows male flowers (“nanners”). Stress can contribute, but unstable genetics are a major cause, which is why feminized seeds from a breeder who stress-tests their lines are worth paying for.

Disclosure: I breed Selfie Seeds™, and most of the genetics I’ve grown out and wanted to run again are available there. You don’t have to buy from me. Any reputable feminized photoperiod seed will work with this guide.

Soil and nutrients

The feed schedule in this guide is built for Happy Frog soil and the General Hydroponics Flora Trio (Micro, Grow, Bloom) plus CaliMagic. That is all you need. I have tested every style of growing, and synthetic nutrients work better. It is like taking medicine intravenously instead of through a time-released pill: it is immediate and direct, and it does not have to be broken down first the way organic top dresses do. Research on organic versus conventional food, summarized by the Harvard Gazette, finds no clear safety or nutrition advantage for organic. The NPK ratios in this feed schedule are based on published cannabis NPK research and then tweaked over hundreds of my own grows and user feedback. How to mix them and when to water is covered in the 7 rules of feeding and watering, right after germination.

Soil

Happy Frog is a biologically active potting soil, and it’s what the feed schedule was tested on at about 78°F. Bags vary, though. Lab and slurry tests I ran showed a wide pH range, and some bags arrive with fungus gnats. A good alternative is ProMix HP (HP stands for high porosity). ProMix has fewer nutrients and less biodiversity than Happy Frog, so feed it with the week 3 amounts from week 1 (see the ProMix HP lab test). In my experience and from user feedback, ProMix HP‘s pH has consistently been in range.

Slurry test your soil. Mix soil and water 1 to 1, let it sit overnight, then measure pH. Happy Frog tested at 5.2 in a lab and 4.9 in my home slurry test. A comfortable range is 5.8 to 6.5, so adjust before planting if you read well outside it. This is why I recommend pH balancing Happy Frog before you plant: bags vary a lot, and a bag this acidic can keep plants from taking up nutrients properly. See the full results in the Happy Frog lab test.

Premoisten the soil. Wet it until saturated (you shouldn’t be able to squeeze water out), mix it by hand and fill the pot without pressing it down. Let it sit for about five days so the microbes wake up. This is why a seedling in premoistened soil needs no scheduled watering for its first six days or so.

Full written steps: how to prepare your pots and test your soil.

How to germinate cannabis seeds

Germination takes about 4 days on average. When the seedling breaches the soil surface, that is day 1 of the week-by-week schedule. All germination methods I tested in a side-by-side of seven worked; rapid rooters finished first, and paper towel, direct soil, rockwool, coco plugs, cup of water and alfalfa-sprout style all sprouted. This guide uses the simple direct-in-soil method.

1. Wipe the seed. Dab it with a paper towel dampened with 3% hydrogen peroxide for about 30 seconds. This kills any mold spores on the seed.
2. Plant it 1 inch deep. Place it in a small hole, pointed end down (the flat, dimpled end on the opposite side faces up), and cover it lightly.
3. Cover with a clear cup. This acts as a dome and holds humidity near 80%.
4. Light on 24 hours at 250 PPFD (about 30% intensity on the dimmer, with the light about 20 inches above the pot). Seal the tent and leave the fans off until the seedling emerges.
5. Wait for day 4. When the seedling breaches the soil (day 1 of the week-by-week schedule), poke three pencil-sized holes in the cup, drop the light to 18 hours on and 6 off, and follow the week-by-week schedule. Widen the holes whenever you see drops form on the cup.

Check your temperature. This guide was tested with soil at about 78°F. At 30% intensity a sealed tent has not overheated for me, but every light and tent differs, so put a thermometer at pot level on day one.

Advanced mode: rapid rooters. This method sterilizes the rooters first, because seeds can carry fungal spores, mold or bacteria. Submerge them in water with about 2 ml of hydrogen peroxide (optional nutrients up to 150 ppm), squeeze out the bubbles, then squeeze again so each weighs about 25 grams. Seat the seed with the dimpled end facing up, keep it warm (about 85°F) under roughly 200 PPFD, and wait at least 3 days. Move it into the soil once the root shows at the bottom of the rooter.

Read germinating with rapid rooters for the full write-up.

The 7 rules of feeding and watering

1. Remove chlorine. Let tap water sit overnight in an open container. For faster results, add about 2 drops of 3% hydrogen peroxide per gallon, which reacts with free chlorine. Chloramine does not leave water by standing; check your water report, and use a carbon filter or a chloramine neutralizer if it's present. Read the full chlorine and chloramine article. Check whether your local water has chloramine with the chloramine checker.
2. Water when the lights turn on. Plants drink most then, and wet soil through the dark hours can waterlog roots, the main cause of overwatering.
3. Match water to plant size. Because the soil was premoistened and the seedling is tiny, the first watering comes around day 7. Amounts then grow each week (see Week by week).
4. Water slowly. Use a watering can, avoid the main stem and take rounds between plants so pools don't form.
5. Mix nutrients in order. Add them left to right (CalMag, Micro, Grow, Bloom), in ml per gallon, and mix each in thoroughly before adding the next. Never combine the concentrates directly.
6. pH last. After the nutrients are mixed, test with a calibrated meter, then add tiny amounts of diluted pH Up or Down, stir, wait and retest. Always dilute the adjusters first.
7. Don't overwater early. For the first four weeks, poke a finger an inch into the soil and feed only if the tip is dry. Once the plant is bigger than the pot, water until you see the first drip from the bottom.

Always use pH Up and Down and nutrient concentrates as directed on the label. They are corrosive.

Need exact ml for your plant count? Use the feed calculator.

Vegetative stage: weeks 1 to 6

Veg is where you build the plant. Run 18 hours of light on and 6 off, raise the light intensity and feed a little more each week.

Nutrient numbers are ml per gallon of feed water, added left to right (CalMag, Micro, Grow, Bloom), then pH last. Fan numbers are the speed settings on both fans. Schedule v26.a from the HWGROW cheat sheet, based on Happy Frog soil at about 78°F with 18 hours of light in veg. For exact ml for your plant count, use the feed calculator.

Week by week

• Week 1: plain water only (no nutrients, no CalMag, no pH adjusting): 1 cup when an inch down is dry. Light 250 PPFD (30% at 20 in), humidity 80% under the dome, fan 1. Keep the dome on and widen the holes each time you see drops form. With ProMix HP, use the week 3 feed instead.
• Week 2: plain water only: 2 to 3 cups every 4 to 6 days. Light 275 PPFD (30% at 20 in), humidity 80% under the dome, fan 1.
• Week 3: remove the dome once the leaves start touching its sides, then start the first feed: CalMag 1, Micro 2, Grow 1, Bloom 1 ml per gallon, pH 6.3. Water 4 to 6 cups every 6 to 8 days. Light 300 PPFD (40% at 20 in), humidity about 70%, fan 2.
• Week 4: start topping (see How to top below). Feed CalMag 1, Micro 4, Grow 1, Bloom 2 ml per gallon, pH 6.3. Water 4 to 6 cups every 6 to 8 days. Light 350 PPFD (40% at 20 in), humidity about 70%, fan 3.

How to top (start in week 4)

Cut or pinch the main stem above a node so the plant grows several main tops instead of one. Top at the 4th node, ideally when the lights come on, and wait for strong growth before each next round. See the full topping and canopy formula guide.

How many times to top. Each finished top needs about 4 square inches of canopy. Multiply tent width by length in inches, divide by 4 for the total number of tops, then divide by your plant count and round down to a power of two. Every complete round of topping doubles the tops: 1 round gives 2, 2 rounds give 4, 3 rounds give 8 and 4 rounds give 16. Let the topping calculator do the math.

Weeks 5 and on

• Week 5: you can now angle fans so the air moves indirectly across the plants, just enough to make the leaves gently vibrate (fan 4). Feed CalMag 1, Micro 5, Grow 1, Bloom 3 ml per gallon, pH 6.3. Water 6 to 9 cups every 3 to 5 days. Light 400 PPFD (40%, moving to 50% at 22 in), humidity about 60%.
• Week 6 and on: extend this week until the plant reaches the size you want. Feed CalMag 1, Micro 6, Grow 1, Bloom 3 ml per gallon, pH 6.4. Water until you see the first drip from the bottom. Light 500 PPFD (50% at 22 in), humidity about 60%, fan 4.

Drip irrigation is optional and advanced. Most first grows are better off hand watering slowly as above. Do NOT set this up unless the plant is bigger than the pot, which averages around week 5, so realistically from week 6. Once it is, a pump, drip kit and a smart plug on a timer can feed automatically. Set it to run shortly after the lights come on, test it by hand first, and keep the water level below the drip line so nothing siphons. More: DIY drip irrigation setup.

Before the flip. Two days before you switch to 12 hours, defoliate the bottom half of the plant and feed right after. Remove leaves that are dying, shaded or facing into the plant, and don't pull more than you can justify. The next section covers the flip.

Read 10 practical defoliation tips.

When to flip to flower

The flip is the day you cut the light from 18 hours to 12. Flip by space, not by the calendar. Photoperiod plants roughly double in height after the flip, so flip when the plant is about half the height you want at the end.

More: when to flip cannabis to flower.

The flip formula. Measure from the top of the soil to the tent ceiling, subtract 10 inches for the light and its clearance, then divide by 2.

Flip height = (tent height from soil − 10 in) ÷ 2

Example: a 64 inch tent gives 64 − 10 = 54, and 54 ÷ 2 = 27 inches. Flip when the plant reaches about 27 inches, and set the timer to 12 hours on, 12 off. Stretch varies by strain, so adjust the divisor on your next run if your plants stretch more or less.

Bloom stage: weeks 1 to 8+

Bloom runs 8 to 11 weeks in total. Light stays at 12 hours on and 12 off the whole time. Settings change through week 4 and then hold, with only the light and water adjustments listed, until the trichomes are ready (see harvest below). Nutrient numbers are ml per gallon of feed water, added left to right (CalMag, Micro, Grow, Bloom), then pH last. Use the feed calculator for exact ml.

What to do each week

• Week 1 (week 7 overall): support or trellis the plant as it stretches. Feed CalMag 1, Micro 5, Grow 2, Bloom 5 ml per gallon, pH 6.4. Water 11 to 14 cups every 4 to 5 days. Light 600 PPFD (70% at 20 in), humidity about 55%, fan 5.

• Week 2: check for sex. Males show small ball clusters at the branch joints, usually 3 to 5 days after the flip; females show white pistils. Remove any male immediately unless you plan to breed, and check carefully for hermaphrodites (balls mixed in with the pistils, or banana-like growths); see what balls, nanners and herms look like. This is also a good time to take clones of any female you want to keep. Feed CalMag 1, Micro 4, Grow 3, Bloom 6 ml per gallon, pH 6.5. Water 11 to 14 cups every 4 to 5 days. Light 700 PPFD (70% at 20 in), humidity about 55%, fan 6.

• Week 3: feed CalMag 1, Micro 4, Grow 4, Bloom 7 ml per gallon, pH 6.5. Water 12 to 16 cups every 3 to 4 days. Light 750 PPFD (80% at 18 in), humidity about 50%, fan 7.
• Weeks 4 and 5: feed CalMag 1, Micro 4, Grow 3, Bloom 9 ml per gallon, pH 6.4. Water 12 to 16 cups every 3 to 4 days. Light 800 PPFD (80% at 18 in), humidity about 45%, fan 8.
• Weeks 6 to 8: same feed (CalMag 1, Micro 4, Grow 3, Bloom 9 ml per gallon, pH 6.4). Water 13 to 17 cups every 3 to 4 days. Light 800 PPFD (90% at 18 in), humidity about 45%, fan 8.
• Week 9 to chop: same feed. Water about 9 cups every other day and pull the light back to about 80% at 20 in. Week 9 is when the buds look their prettiest, so take your photos then.
• No-nitrogen mix: only if the leaves are still very dark green in bloom week 5 or later (see the troubleshooting section). Same feed with Flora Micro at 0: CalMag 1, Micro 0, Grow 3, Bloom 9 ml per gallon, pH 6.4.

How to read your leaves: nutrient burn and deficiencies

Deficiencies will rarely apply if you follow the feed schedule. Most of the time they show up because the grower did not trust the system and added something extra, which locked out another nutrient or threw off the ratios. Before adding anything, check the basics: pH of your water and runoff, how much you're watering, and your water source (chloramine can cause spotting and decline that no supplement fixes). Then match what you see. For photos and fixes of every deficiency, watch the deficiency masterclass.

Why green leaves at the end matter. A natural fade (senescence) late in bloom is normal. Very green leaves at chop usually mean the plant had too much nitrogen. In my experience excess nitrogen makes for harsher smoke that takes longer to cure, which is why Flora Micro is lowered in bloom.

Fix problems gradually. Change one thing at a time and give the plant a few days. Damaged leaves, especially browned tips, will not heal, so judge by the new growth.

In a study I walked through in a video, iron and manganese deficiencies showed no meaningful difference from the control, because Flora Micro and most standard nutrients already contain enough of them.

When to harvest: reading trichomes

Harvest by trichome color, not by the calendar. Trichomes are the tiny glassy mushroom-shaped glands on the buds, and their heads change color as the plant matures. You need a magnification tool to see them: a jeweler's loupe (about $10) or the macro camera on a modern phone.

Read when to harvest: trichome color and readiness guide.

Individual strains vary, so use these weeks as a guide.

How to inspect. Don't judge by the top bud alone. Check three buds from about one third of the way down the plant, because buds closest to the light mature first. Ignore fan leaves and sugar leaves, which brown early. When most heads on those buds are milky, with the first small specks of amber, it's time.

Staggered harvest. If the tops are ready before the lower buds, chop the top, wait about four days, then take the middle, then wait about a week and take the bottom. If you chop everything at once, use the one-third-down rule.

See how to prevent larf and popcorn buds.

Just before chop. Pull the light back to about 80% at 20 inches during the final weeks. Chop in the morning, right before the lights would normally come on and before you would feed, so the plant holds less water.

How to dry, trim and cure

Freshly cut buds are about 75% water by weight. Drying brings that down to roughly 10 to 15% and lets chlorophyll break down, which removes the hay and grass smell. Good drying and curing protect the aroma and potency you grew.

Dry (3 to 14 days)

1. Pick a dark room near 60°F and 55% humidity. Light degrades THC. Small swings are fine, but stay within about 10 degrees of these targets and avoid big fluctuations. Use a heater, AC, humidifier or dehumidifier if needed.
2. Chop and hang. Remove large fan leaves and any yellowing leaves, which lowers the risk of mold. If the plant collapses once the supports come off, cut it by branch.
3. Space the buds out. Nothing should touch. A small fan on low can help, aimed at a wall at an angle, never at the buds.
4. Watch the smell. Days 1 to 2 smell like pungent bud. Around days 3 to 5 you'll notice a hay-like smell as chlorophyll breaks down. That is normal.
5. Check the stem snap from about day 5. Bend a stem as thick as a toothpick. If it bends, wait another day. If it cracks, the buds are ready to trim and jar.

A more precise method is weight: I wait until about 70% of the original weight has evaporated, and 72% has been my sweet spot over several years of tracking.

Why not dry fast? Low humidity dries buds too quickly and can trap chlorophyll in the center. High humidity risks mold and bud rot.

Trim

There is no single right way. Wet trimming (before drying) works for dense, leafy buds, because removing leaves helps them dry evenly and fast. Dry trimming (after drying) suits slim buds with few leaves. You can also do a light wet trim and a detailed dry trim.

• Plan on about 1 to 2 hours per ounce of bud.
• Work on a clean surface with gloves, clean trimming scissors, rubbing alcohol and paper towels.
• First buck the branch into individual bud sites, leaving a small stem as a handle.
• Trim sugar leaves close to the bud, and remove burnt tips and leaf material with little trichome coverage.
• A trim tray lets loose trichomes (kief) fall through for you to collect.

Cure

Curing is slow, controlled drying in sealed containers. Put trimmed, dry buds in jars and open them regularly at first to let moisture and gases out (called burping). I target about 62% humidity in the container and keep curing until the humidity stabilizes. That, not a set number of days, is your signal.

If you cure a lot, a large plastic tub with a humidity controller and a small dehumidifier can replace burping jars: set the controller about 2% under your target to allow for lag, and roll the jars every week or so. The process takes time, and in my tub it took a little over two months for humidity to hold within about a four-point range. Excess nitrogen in the plant also extends cure time, so a clean feed pays off here. The tub must be completely sealed, so you may need to make a hole and seal it with some tape. Full instructions: how to cure weed.

Frequently asked questions

How long does it take to grow weed at home?

About 4 months from seed to harvest: roughly 4 days to germinate, 6 weeks of veg and 8 to 11 weeks of bloom, which is 14 to 17 weeks from sprout to chop. Drying and curing add several more weeks.

Is growing weed at home easy for beginners?

Yes, if you control the environment and keep the process simple: one feminized photoperiod seed, a tent, an LED light, soil and a feed schedule. Most beginner problems come from overwatering, wrong pH or poor genetics.

How much does it cost to start growing?

Plan on approximately $600 for your first plant and about $100 for each plant after that. The light is the biggest expense. If your budget is tight, spend on the light first, then genetics, then everything else. Used tents and fans can cut the cost.

What is the best way to start seeds?

All seven methods I compared worked, and rapid rooters sprouted first. Direct sowing in premoistened soil is the simplest and is what the feed schedule assumes.

Should beginners grow autoflowers?

I recommend feminized photoperiod seeds. I have witnessed too many first-time growers end up with small plants and low yields from autoflowers, so I advise against them. If you do run autos, hydro or coco is the recommended medium for large plants (see Maximizing Autoflowers). Photoperiod plants let you decide when to flip.

What soil is best for growing weed?

The feeds in this guide are written for Happy Frog, adjusted for its starting pH. ProMix HP is a good alternative, but it lacks the biodiversity Happy Frog provides and has fewer nutrients. Test the pH with a slurry test before planting.

What nutrients do I need?

General Hydroponics Flora Micro, Grow and Bloom, plus CaliMagic. Follow the week-by-week feeds in ml per gallon.

What pH should my water be?

About 6.2 to 6.5 in this guide. Adjust only after mixing the nutrients, with a calibrated meter and diluted pH Up or Down.

Can I use tap water?

Usually, after letting it sit overnight to release chlorine. If your water report lists chloramine, standing won't remove it, so use a carbon filter or chloramine neutralizer.

When should I top my plant?

Week 4 of veg, at the 4th node, ideally when the lights come on. Wait for strong growth between rounds.

When do I switch to 12/12?

When your plant reaches your target height. Use the formula in the flip section.

How do I know if my plant is male or female?

You can't tell until the pre-flower stage, and the first reliable female sign is white pistils at the nodes. Males show clusters of balls. Remove males before they release pollen.

How do I know when to harvest?

Check trichomes with a loupe. Most heads should be milky, with a few amber specks.

How long should I dry and cure buds?

Drying takes about 3 to 14 days depending on bud size and conditions. Cure after that in sealed jars, with humidity around 62%, until the humidity stabilizes.

How many plants can I grow?

Check your local limit first, then size the tent. As a rule of thumb, allow about 4 square feet of canopy per full-size plant.

Go deeper

• Seeds: Seven germination methods compared · Germinate in rapid rooters
• Setup: Tent configurations · How to pick an LED · Measure light intensity · Install a large LED · Best tent humidifier
• Soil and water: Happy Frog lab test · Soil preparation · Slurry test · Chlorine and chloramine
• Plant care: Top or FIM · When to flip · Defoliation tips · Drip irrigation · Cloning · Identify a male
• Troubleshooting: Nutrient burn and flush · Nutrient deficiencies
• Harvest and cure: Trichomes with a loupe · When to harvest · Dry · Trim · Cure tub

Follow along with the interactive cheat sheet.

Keep learning with HWGrow

This guide covers the full grow in one page. If you want to go further, there are two ways to learn alongside me.

• Grow with Me Masterclass: follow a real grow day by day, from seed to harvest, with the exact settings and decisions behind this guide.
• Breeding Masterclass: learn how to make your own seeds and strains, from picking parents to pheno hunting.

Prefer to just say thanks? This guide is free because of supporters. You can buy me a cup of coffee or support HWGrow directly. Both go straight into more tested, free tutorials.