How long will needs seeds to germinate?
That’s very variable according to the species. Under the best conditions (see growing advice and the articles), it may take some days, or even just some hours for the fastest (Astrophytum) up to some months or some years for the slowest (Opuntia, Thephrocactus). For most species, germination will start after 4 or 5 days. After 2 to 3 weeks, you may consider that everything that could germinate has really done so.
