Is this size of pumice fine for top layering in seed germination? Or is perlite better?

Is this size of pumice fine for top layering in seed germination? Or is perlite better?

u/CaBell_ — 5 days ago
▲ 88 r/Astrophytum+2 crossposts

Astro Mail

Glad I unpotted them. There was one pot that had an infested soil.

u/CaBell_ — 7 days ago
▲ 6 r/cactus

Are these etiolated?

Very new to caring of cactus and I have noob eyes. First time germinating astrophytum seeds I got from our local propagator. I'm doing an experiment where one lot grows in gritty mix (or generally less favorable conditions) while the other grows in peat and perlite mix (optimal conditions). This one is the former, sown in Aug. 4, and placed in a moderately sunlit shaded area.

u/CaBell_ — 9 days ago
▲ 42 r/Lithops+1 crossposts

Very new to lithops, what are their names?

I finally received my lithops from Vietnam and I wasn't expecting this much variation. I have very noob eyes and would like some help in identifying them.

u/CaBell_ — 10 days ago