Great tip on the toothbrush and good save on your spider mites infested adenium. I wonder if the hard crust is calcium build up?
I lost a lot of seedling from adeniums, mainly because they weaken the seedlings. I am experimenting right now where before it gets too bad, everytime I water the seedlings, I gently wash the leaves (especially the underside) to disrupt the breeding process and allowing the new leaves to grow healthier. This is not easy since the seedlings are so tiny. So far it has worked, I still lost a few (the ones that lost leaves) but a lot of the other seedlings are growing healthy leaves.
