Growing Cannabis in Containers Outdoors: A Step-by-Step Approach
Growing cannabis in containers outdoors gives you the sun’s free energy plus the control and mobility of pots, you can move plants to chase light, shelter them from bad weather, and manage the soil precisely. The biggest factors are pot size and type: bigger is better for outdoor plants, with many growers using 10-15+ gallon containers (or larger for big plants) so roots have room to build a heavy yield, and fabric pots are popular for their drainage and ‘air-pruning’ of roots. Fill them with a quality, well-draining mix, place them in full sun, water consistently (outdoor pots dry fast in heat), and you can grow big, healthy plants almost anywhere with a sunny spot.
Choosing Pots: Size and Material
Match the container to the plant and climate:
Recommended Strains
Alien Cookies x Kush Mints
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THC | 33% - 34% (High) |
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Type | Feminized |
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Yield | High |
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Phenotype | 80% Indica / 20% Sativa |
Alien GG
|
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THC | 23% - 24% (High) |
|
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Type | Feminized |
|
|
Yield | High |
|
|
Phenotype | 70% Indica / 30% Sativa |
| Choice | Notes |
|---|---|
| Size | 10-15 gal for most; larger (20-30+ gal) for big plants |
| Fabric pots | Great drainage, air-prune roots, breathable |
| Plastic pots | Cheap, hold moisture; ensure drainage holes |
| Ceramic/thick-walled | Insulate roots on cool nights; heavy |
| Drainage | Essential, avoid waterlogging and root rot |
Promos & Deals
Why Pot Size Matters Most
Outdoors, container size is the single biggest lever on how large your plant, and your harvest, can get. Roots need room to expand, and a bigger pot holds more soil, water and nutrients, supporting a bigger plant above ground. That is why many outdoor container growers use at least 10-15 gallons, and go to 20, 30 gallons or more for large plants that will grow all season. Too small a pot restricts roots and caps your yield, and dries out fast in summer heat.
Material matters too: fabric pots drain freely and ‘air-prune’ roots for a healthier root ball, plastic is cheap and holds moisture (just ensure drainage), and thicker-walled pots insulate roots on cold nights. Pick the biggest practical pot you can water reliably.
Soil and Feeding for Container Plants
In a pot, your soil is the plant’s whole world, so quality matters. Use a light, well-draining potting mix rich in organic matter, the same qualities that make good cannabis soil anywhere, so roots get both moisture and oxygen. Many outdoor growers build or buy an organic ‘living’ mix amended with compost and worm castings so the soil feeds the plant through much of the season, see our guide to organic soil and the broader best cannabis soil guide.
Feed appropriately for the stage (more nitrogen in veg, more phosphorus and potassium in flower), and remember that frequent watering in pots can flush nutrients, so container plants often need steadier feeding than plants in the ground.
Sun, Heat and the Mobility Advantage
The great advantage of containers is that you can move them. Place pots where they get maximum direct sun (ideally most of the day), and because they are portable you can reposition them to follow the light, pull them into shelter before a storm, or move them out of extreme midday heat.
That mobility also helps with security and with extending the season. Watch heat, though: dark pots in full sun can overheat the root zone, stressing the plant, so consider lighter-colored or fabric pots, or shading the containers themselves, in hot climates. The ability to physically manage each plant’s sun, temperature and shelter is a real edge containers have over growing straight in the ground.
Watering Container Plants Outdoors
Watering is where container growing demands the most attention, because pots dry out far faster than open ground, especially in summer sun and wind. Water consistently and deeply, letting the top of the medium dry slightly between waterings so roots get oxygen but the plant never wilts, and in peak heat large plants in pots may need watering daily or even twice a day.
Good drainage is the other half: always use pots with drainage holes (or fabric) so excess water escapes and roots don’t rot. Drip irrigation or self-watering setups help keep big outdoor pots consistent if you can’t water by hand every day. Consistent moisture, never waterlogged, never bone-dry, is key to healthy container plants.
The Bottom Line on Container Growing Outdoors
Growing cannabis in containers outdoors combines free sunlight with control and mobility, and success comes down to a few things: use a big enough pot (10-15+ gallons, more for large plants), ideally a breathable fabric pot with good drainage; fill it with quality, well-draining, organic-rich soil; place it in full sun and move it to manage light, heat and weather; and water consistently, since pots dry fast.
Feed for the stage and watch root-zone heat in dark pots. Get the pot size and watering right and containers let you grow big, healthy, high-yielding plants almost anywhere with sun.
FAQs about growing cannabis in containers outdoors
What size container should I use outdoors?
Bigger is better outdoors. Most growers use at least 10-15 gallon pots, and 20-30+ gallons for large plants grown all season. More soil means more room for roots, water and nutrients, which supports a bigger plant and harvest. Too small a pot restricts roots, caps yield and dries out fast in summer heat.
What are the best pots for outdoor cannabis?
Fabric pots are a top choice: they drain freely, ‘air-prune’ roots for a healthier root ball, and breathe. Plastic pots are cheap and hold moisture (just ensure drainage holes), and thicker-walled pots insulate roots on cool nights. Whatever you choose, prioritise size and drainage, those matter more than material.
How often do outdoor container plants need water?
More often than plants in the ground, since pots dry fast. Water consistently and deeply, letting the top of the medium dry slightly between waterings; in peak summer heat, large potted plants may need daily or even twice-daily watering. Always use drainage so roots never sit waterlogged. Drip irrigation helps keep big pots consistent.
Pots or ground for outdoor cannabis?
Both work; pots trade some maximum size for control and mobility. Containers let you manage the soil precisely, move plants to chase sun or escape bad weather, and grow where the native ground is poor. In-ground plants can get bigger with less watering but can’t be moved. For most home growers, big pots offer the best balance of control and yield.
