Garden Tray square 25 x 25 cm

A square plant tray of 25 by 25 centimetres and 4 centimetres deep, made for the square 11 litre growing pot. Black plastic, holding around 2.5 litres.

Why a 24 centimetre pot fits a 25 centimetre tray, and a 25 does not

Choosing a tray, you naturally look at the number in the product name, and that is exactly where it goes wrong. Every square pot in this range tapers, so the stated size is the rim and the base is clearly narrower.

The 11 litre pot is called 24 by 24 centimetres. Its base is a fair bit smaller than that, and it therefore sits comfortably on this 25 centimetre tray with room to set it down straight.

The rule that follows: size by the base of the pot, not by the rim. A tray needs to be slightly larger than the base, not than the top. If in doubt, stand the pot upside down on the tray and see whether the rim stays clear.

There is a second reason not to choose tightly. A pot that wedges into a tray seals it, and then the collected water cannot get out when you lift it. A few millimetres of play keeps it workable.

What the tray holds

At 25 by 25 centimetres with a 4 centimetre rim it takes around two and a half litres. That is comfortably more than the run-off from a normal watering on an 11 litre pot, which comes to about two litres.

As with any tray: do not leave the pot standing in it with water in it. Water that has run through is more concentrated than what you gave, and the substrate pulls it straight back up.

Technical Specifications:

• Dimensions: 25 x 25 x 4 cm
• Capacity: around 2.5 litres
• Colour: black
• Fits under: square pot 11 litre

Frequently asked questions

Will the 18 litre pot fit on it? No, that one is too wide. The 29 centimetre tray is for that.

And the 7 litre? It sits on it easily, but the 17.4 and 20 centimetre trays are better matched to it.

How many fit on a square metre? Sixteen touching.

Can I use it as a seed tray? It has no holes, so only as a catch tray or for watering from below.