Why Are Filifera Seedlings Dying?
I'm trying to grow some W. Filiferas from seed, but I'm doing something wrong; can you help me?
I'm in Lubbock, TX (Zone 7a), and it's been HOT lately (+105f). I originally had trouble with seedlings being knocked over by the wind, so I built this little greenhouse. They have steadily been dying, and I think it's water-related.
They are planted in a (roughly) 80/20 coir/sand mix, but I'm experimenting with a few; they're in a 80/20 sand/coir mix.
I'm thoroughly watering them about twice per week. They seem to flop over, and never come back. The last pic shows the bottom of a dead seedling; you can see how the trunk is hollow and flat.
What do y'all think? Too much or too little water?