Hardening off

[christ_hears]

Here's a few photos, just wondering when I should start thinking of hardening off or even repotting? Or do I just quit rushing things hahaha. also, are the pinkish one something to worry about?

[esp_imaging]

These look like they are happy and making good progress, so keep them as they are for quite a bit longer.
Maybe reduce the light levels a tiny bit (maybe this will happen anyway where you are with the change of the seasons), but slight hints of pink are fine with many species.

[greenknight]

Agreed. When they look like miniature versions of an adult cactus plant, instead of green blobs with a few spines on top, you can start thinking about hardening them off. As for potting them up - cactus seedlings like it a bit crowded. When they run out of room to grow, then it's time to repot.

[christ_hears]

i appreciate the responses! these are under complete artificial light, 16 hours a day. Should i reduce to maybe 14? and this maybe a little off topic, but are these too small to graft onto pereskiopsis?

[7george]

Pinkish ones are new-born, they will be fine soon. White ones might be without any pigment, there is not much we can do about it. These can stay there a couple of months more in the same substrate. It is good to know what you gain every time you transplant your seedlings: more room for growing, better soil (esp. if the first one is purely mineral) or better light or temperature conditions.

i appreciate the responses! these are under complete artificial light, 16 hours a day. Should i reduce to maybe 14? and this maybe a little off topic, but are these too small to graft onto pereskiopsis?

Keep the light same until next move. They are not too small, grafting depends on your skills and graft stock state (active growth, high temps & so).