Hello, do you know how many cm in diameter has an adult Lobivia wrightiana non grafted?

Hello,

Do you know which are the best color of volcanic stone to to sow and grow up cactus and other succulents?
I have seen black, red, orange, yellow, white (pumice), buy I do not know which are good or bad.

Hello,
Do you know smaller Astrophytum species than 5 cm in diameter in adult form (non-grafted)?

In baggie method is necessary make little holes in the bottom of the pot? Or do I need make them before taking them out?

Hello , do you know how much time are viable Escobaria abdita Seeds? (If they are Keeping un a dry and fresh box) I do not want to sow they these seasons.

Don't open the bags until you are ready to permanently take the pots of seedlings out of them. All you'll do is allow fungal spores etc in. The only exception to this is with the very slow growing genera, Aztekium, Blossfeldia etc where after a year or so you may need to top up the water inside. Wo...

Hello,

About baggie method, I have read many times people open bags each 3 days afer third month, and then they close them (I think they do it to water with fungicide).

Do you know why they do that? And how often do you recomend open bags?