Soil for Collected trees
- Best soil after collecting is straight pumice, if you have it. High drainage soil is best, can even fall back to lava. 
- Top dress with sphagnum (can mix with standard dry chopped moss. 
- Keep moist but let it drain. 
- Including redwood. 
- Problem with potting soil is that it can dry out and become hydrophobic and not rehydrate.