Gymnocalycium gibbosa - 9 months
I tried to grow some Gymnocalycium Spegazzini (from a Guest Speaker) last year but none survived. This year I'm keeping them in the heated propagator much longer - here they are at 8 weeks
Mammillaria gilensis at 12 weeks and 6 months - very pronounced tubercules at an early age
Mammillaria wildtii at 6 months (even more pronounced tubercules)
Matucana haynei at 6 weeks, 15 weeks and 2 years. This had stopped growing for nearly 12 months and I had nearly given up on it. I repotted it this year and it has started growing again (below)
Melocactus amethystinus at 6 weeks, 16 weeks and 2 years
Melocactus neryii - 9 months
Notocactus (parodia) curvispinus - 9 months (no sign of curved spines yet!)