null on Universal
Quick answer
If your Universal has null, the most likely cause is: Stem cuttings root via adventitious rooting — cells at the cut surface dedifferentiate into callus, then form meristemoids that develop into root primordia. This process is regulated by auxin accumulation and requires 70-75°F (21-24°C) soil temperature for optimal results.
Start here:
- 1. Select 4-6 inch terminal shoot with 3-4 nodes from healthy current-season growth
- 2. Cut 1/4 inch below a node using sterile sharp scissors; remove lower leaves
Why Universal gets null
Stem cuttings root via adventitious rooting — cells at the cut surface dedifferentiate into callus, then form meristemoids that develop into root primordia. This process is regulated by auxin accumulation and requires 70-75°F (21-24°C) soil temperature for optimal results.
How to reverse null on Universal
- 1
Select 4-6 inch terminal shoot with 3-4 nodes from healthy current-season growth
- 2
Cut 1/4 inch below a node using sterile sharp scissors; remove lower leaves
- 3
Allow cut to callus 2-4 hours before dipping in IBA rooting powder
- 4
Insert into pre-moistened perlite/peat mix; cover with humidity dome
- 5
Maintain 70-75°F soil temperature; roots develop in 4-8 weeks depending on species
- 6
Remove any flower buds before sticking — flowering reduces rooting percentage
Keep null off this Universal
Take cuttings from juvenile stock plants; use rooting hormone; maintain high humidity and bottom heat during establishment.