Square plant pots for indoor growing

Which pot size to choose

Number of plants, pot volume and length of the vegetative stage go together: a plant that has to fill a quarter of the tent on its own needs a big pot, a plant with only a few weeks of vegetative growth does not. The table links the pots in this collection to their typical use.

PotTypical usePlants per m²
Teku 0.7 Lrooted cuttings and seedlings in the first 2–3 weeks–
SK 3.5 L and 5 Lintermediate pot; many small plants (SOG)9–16
SK 11 L and 14 Lstandard grow, autoflowers4–9
SK 18 L and 25 La few large or trained plants (SCROG)1–6

In practice, by tent size and for medium-sized plants without training:

Grow tent (cm)Medium-sized plantsFinal pot
60x602–311 L (1 large plant: 18 L)
80x803–511–14 L
100x1004–911–18 L
120x1206–1211–18 L

With 6–9 plants per m² stay with the 11 litre pot, with 4–6 move up to 14–18 litres. How plant count, method and floor area fit together is explained in the guide on how many plants fit in a grow tent.

Square or round, plastic or fabric

Square pots use the floor better than round ones: they sit side by side without gaps, and in a tent every centimetre of covered floor is light put to use. Check that the pots fit with a few centimetres to spare and that the mature plant stays inside the tent.

Plastic pots hold moisture for longer, so you water less often; they can be washed and reused for many cycles. Fabric pots dry out faster and give the roots more air, but need watering more often. With plastic, drainage matters: keep the holes in the base clear and collect and discard excess water.

Repotting: from seedling to final pot

  1. Rooted cuttings and seedlings start in a 0.5–1 litre pot, such as the 0.7 litre Teku.
  2. After 2–3 weeks, when white roots reach the sides or come out of the holes, move to a 3.5 or 5 litre intermediate pot, or straight to the final one.
  3. Water the small pot lightly the day before so the root ball stays intact when you slide it out.
  4. Put autoflowers straight into their final 7–15 litre pot: they have no time to recover from repotting.

Saucers and drainage

Every pot needs a saucer or a shared tray: the saucers in this collection fit pots of 5–7, 11–14 and 18–25 litres. Empty them after every watering, because standing water raises humidity and attracts fungus gnats. For many pots together, grow tent trays are more practical; the right growing medium is under growing media, and the small pots for cuttings go with the propagation equipment.

Delivery and advice

Prices are in Swiss francs including Swiss VAT. We deliver across Switzerland by Swiss Post; bulky parcels travel by courier. For technical questions the Gro.w.LaB team answers by email and on +41 79 359 67 58, and you can visit the shop in Quartino by appointment.

Useful guides

Frequently asked questions

What pot size should I use in a grow tent?

It depends on the number of plants: 11–20 litres with 4–6 plants per m², 7–11 litres with 6–9 plants, 3–7 litres with 9–16 small plants. In most 80x80 and 100x100 tents the 11 litre pot is the most common size.

Are square pots better than round pots?

In a grow tent, square pots are, because they sit side by side without gaps and use the whole lit area. For the roots, round and square pots of the same volume behave the same way.

How many 11 L pots fit in a 100x100 tent?

Usually 6–9: by the end of flowering each plant has a canopy of about 35x35 cm. More pots would fit on the floor, but the plants would have no room to grow.

When should I repot?

After 2–3 weeks, when the roots reach the sides of the small pot or come out of the holes. Autoflowers go straight into their final pot.