Al's gritty mix questions
I have a few questions about Al's gritty mix that haven't been answered in the copious amount of information I've read (or my fried brain missed it).
1. What is the purpose of each of the 3 components: Turface, granite, bark? Ie, why not just plant in Gran-I-Grit or Turface alone?
2. Does the #2 Gran-I-Grit need to be screened also, or is it close enough to the right size already? I tested a bit, and I was surprised to see about half fit through a 1/8" sheet of hardware cloth.
3. How do you know when your plants need water in this stuff? I've always been able to dig a finger in or feel the weight before. That technique doesn't work with gritty mix.