so a few months a go i planted a few cuttings i got from a friend, and the ones that died...well died.

but of the ones that remain, they are still green and plump, and I've even been able to keep them outside without a cover for humidity. the only problem is the buds. they have turned brown and i assume they are dead. but the cane is still nice and green. they resist being tugged so i assume they have roots.

so what's the problem? and what's the solution?