Citrus fruit from pip.

[2catsandhappy]

Thrilled at growth from non specific Christmas pips(2016) might have been easy-peel-satsuma, or similar. Lime pips, 3,(2021) amazed at taking.

All watered only with rain water.

Really carefully wrapped up(2016 growth) in bubble wrap for winter. Seems to have worked so far.
So my question is, what month do I put into a bigger pot? And what type of pot? Pottery, plastic?
As far as I can read, well drained gravely poor soil. Once a week in summer, soak in deep water and take out
Any tips?

The two big ones don’t need a bigger pot yet. If they’ve been in the same soil for more than a couple of years, you might want to refresh the soil and put then back in the same pot.

The tiddlers I’d leave till spring. You can’t separate them without causing a bit of root damage, so you want them to be ready to grow fast, not thinking of dormancy.

I use plastic pots because clay pots lose water too fast.

I agree, spring is the best time for repotting. They can go outside all summer, and just come into a frost-free place in the winter.

My calamondin is currently outdoors, where it has been since early May, and I'll be putting it in the porch as soon as it looks like night temperatures are dropping below about 7 degrees.