Square Plastic Plant Pots Bulk Packs – x10, x20, x50 | 1L to 30L | Pot King

🪴 Bulk packs of square plastic plant pots in one size: 10, 20 or 50 at a time. Black, sturdy, stackable pots with drainage holes, from 1 litre seedling pots up to 30 litre patio pots.

The round pot is wasting your space

Put round pots side by side and look at the gaps between them. That dead space is the price of tradition. Square pots sit flush, edge to edge, so the same shelf, tray, windowsill or grow tent holds more plants and the compost is where the roots are, not in the corners of your greenhouse bench.

It's one of those quiet upgrades that nobody notices until they've used it. Square pots pack neatly, tip over less, and line up properly in trays. Once you've filled a tent with them, round pots start to look like a design flaw.

Why buy in bulk?

Because pots are never needed one at a time. Seedlings get potted on in batches, cuttings come in dozens, and every spring the whole greenhouse needs sorting at once. Bulk packs mean you buy once, at a lower price per pot, and always have the right size to hand.

• Seed sowing and potting on: 1L to 5L pots for seedlings, plug plants and young veg.
• Cuttings and propagation: A tray of matching pots for houseplant cuttings and new plants.
• Grow tents: Square pots make full use of every inch of floor space.
• Patio and greenhouse veg: 11L to 30L pots for tomatoes, chillies, peppers, potatoes and courgettes.
• Houseplant collections: Practical growing pots that sit neatly inside decorative planters.

Key Features

• Square shape: Sits flush with no wasted space between pots.
• Drainage holes: Excess water drains away so roots don't sit wet.
• Stackable: Pots nest inside each other for compact storage.
• Reusable: Wash and reuse season after season.
• Ten sizes: 1, 2, 3, 4, 5, 11, 14, 18, 25 and 30 litres.

Which size?

• 1–2 Litres: Seedlings, plug plants, cuttings and small houseplants.
• 3–5 Litres: Potting on young plants, herbs, strawberries and medium houseplants.
• 11–14 Litres: Peppers, chillies, aubergines and larger houseplants.
• 18–30 Litres: Tomatoes, potatoes, courgettes and statement plants.

🌱 Rose's Pro-Tip: Pot on gradually rather than jumping straight to a big pot. A small plant in a huge pot sits in cold, wet compost its roots can't reach yet. Go up a size or two at a time and you'll get stronger, faster roots, which is exactly why bulk packs of the smaller sizes are so handy.

📋 Brand Note: These are Pot King square pots. Colour is black.