And its working fine with seedlings? i want to choose just one plant to keep cuttings from for grafting, so do you think i can rely on this species ?

Its Selenicereus.

Is it helio? and whatever it is, can it be used as a stock for seedlings ?

http://img405.imageshack.us/i/1006682f.jpg/

What do you think about Opuntia cylindrica ? do you think i can use it for seedlings ? i have it available here.

I would like to ask about this plant:

is it a Hylocereus ?

I think they are Ferocactus.

Do you think i can graft seedlings on them?

But can i use any glue type? , or some could burn the cactus ?

Can i use Peat moss and silica mix for seeds ? or i have to add another type of soil ?

I found four seedlings rotten, i think they did not like the mix of closed plastic plus the high humidity and high temperature, so i moved the plastic and protected it by a white cloth, what do you think all?

long time ago i germinated many cactus from seeds they were Astrophytum, Ferocactus, and Echino cactus, it was long time about fifteen years ago or so, and i can't remember exactly my way these days also i am not sure it was the optimal one or not, anyway for now i got a collection of seeds from a f...

Mostly a new mutation!

I repeat the question about the soil mix if you don't mind, and i also would like to know the lighting do you keep them out side ? or inside ? thanks.

Thanks!

How much approximately Aztkeium seeds take to start germinating ?