David formulated the question :
I have some large pots with shrubs, trees, etc.

I would like to be able to stand them in a container of water so that I
can thoroughly soak them when required. Needs to be deep enough to come a
reasonable distance up the post so water is likely to soak in quickly.

A yellow builders bucket is just too small; almost worked but then the
corner of a square pot split it.

One obvious option is a water tank designed for the loft.

Another would be a kiddie paddling pool.

Main requirement is for a pot which is 16"x16" (40 cm x 40 cm).

Any budget friendly suggestions, please?

TIA


Dave R

Old plastic dustbin, old wheelie bin, a rigid pond liner, dig a hole,
line it with plastic and fill with water.