A small indoor cannabis grow for one to four plants usually costs $350 to $700 in equipment the first time around. If you buy a prebuilt kit and skip the bargain hunting, expect $650 to $900. If you already own a spare closet, a timer, and a fan, $250 to $350 gets you growing. After that, each cycle runs about $100 to $250 in seeds, medium, nutrients, and electricity.
Those numbers assume a tent in the 2x2 to 4x2 range, a modern LED, and a carbon filter. Nothing fancy. Here is where the money actually lands.
Line-item cost of a first small setup
Ranges below reflect what I see across starter gear in the US market. Cheap end means budget brands and DIY substitutes; high end means mid-tier gear that lasts several cycles.
- Grow tent (2x2 to 4x2): $70 to $160
- LED grow light (100W to 240W): $110 to $280
- Inline fan plus carbon filter: $80 to $180
- Clip fan for airflow: $15 to $35
- Fabric pots, saucers, trellis net: $20 to $45
- Soil or coco mix: $25 to $60
- Nutrients for one or two cycles: $40 to $110
- pH meter and calibration solution: $30 to $70
- Thermometer and hygrometer: $12 to $30
- Timer, power strip, extension cord: $15 to $35
- Seeds or clones: $30 to $120
- Trim scissors, watering can, gloves: $20 to $40
Add it up at the low end and you land near $350. Add it at the high end and you are past $900.
The two items that eat the budget
Lighting and ventilation are more than half the bill, and they are also the two places where cutting corners costs you a whole harvest. A weak light gives you airy buds and a long flowering time. Weak ventilation gives you heat, humidity spikes, and smell leaking into the house.
Light matters more than tent brand. A 100W to 150W LED with good diodes will flower a 2x2 tent fine. A 240W unit covers a 4x2. Buying more light than your space can use wastes money and creates heat you then have to exhaust.
Sizing the fan and filter
Match the fan to the tent volume, not to the biggest fan on sale. A 2x2 tent holds roughly 32 cubic feet. A 4-inch inline fan rated around 100 to 200 CFM is plenty, even with a filter adding resistance. Oversized fans cost more, run louder, and pull humidity out faster than you want.
Three budget tiers
Bare minimum, about $250 to $350. Small tent or a converted closet, budget LED, passive intake with a cheap inline fan, bagged soil, dry nutrients, and a $15 pH pen you replace in a year.
Comfortable starter, about $450 to $700. Solid 2x2 or 4x2 tent, dimmable LED, 4-inch fan and filter combo, fabric pots, a real pH and EC meter, and a hygrometer you actually trust. This is the tier I would recommend to most people.
Upgraded small grow, about $750 to $1,000. Bigger light, better filter, environmental controller, and a second small fan. You are buying stability and repeatability, not more plants.
What each cycle costs after setup
Electricity is the steady drain. A 150W light plus a 20W fan running 18 hours a day draws roughly 3 kWh daily. At the US average residential rate near 17 cents per kWh, that is about 50 cents a day, or $15 a month. Flowering at 12 hours drops it. A 240W setup runs closer to $25 to $40 a month in most states.
Everything else per cycle:
- Seeds or clones: $30 to $120
- Fresh medium: $25 to $60
- Nutrients: $20 to $50
- Electricity: $45 to $130 for a full run
- Replacement bits (pH solution, filters every few cycles): $15 to $40 amortized
So a typical cycle lands between $100 and $250 depending on how many plants and how long you veg.
Ways to trim the cost without wrecking the grow
Skip the kit. Bundled kits almost always include a light that is weaker than the tent deserves, and you pay for the box and the branding.
Buy the light once. A dimmable LED from a known manufacturer will outlast two cheap replacements and produce more per watt.
Soil and dry nutrients beat bottled liquid lines on price for a first run. You do not need eight bottles to grow four plants.
Use a closet you already have if the space is dark, ventilated, and away from bedrooms. That saves the tent cost, though you still need light-proofing for flowering.
Start from seed rather than clones if your state allows it. Seeds ship easily and cost less per plant, though clones save you three weeks of veg time.
Don't cheap out here
A carbon filter is not optional indoors. Without one, the last four weeks of flower will announce themselves to the whole floor of your building. Buy a filter rated for slightly more airflow than your fan and replace it every two or three cycles.
Get a pH meter with calibration powder and use it. Lockout from bad pH is the most common reason a first grow stalls, and it looks exactly like a nutrient deficiency.
Buy a timer. Hand-flipping lights to 12/12 works until the night you forget.
Check the legal side before you spend a dollar
Home cultivation rules vary by state and often by city or county. Plant counts, whether you must be a registered patient, whether you can grow outdoors, and whether you can legally buy seeds all differ. Some states allow four plants per household; others allow six per adult with a cap. A few still treat any home grow as a misdemeanor.
Verify your local limit and any registration requirement first. A $600 setup is a waste if the plant count is illegal where you live, and equipment is not something you can return once it has been used.
One last thing. Budget a little for a drying space and jars. Curing is part of the cost of a first harvest, and a $40 box fan and a hygrometer beat rushing the dry because you ran out of money.