Nuttier than your average Nut
- Reaction score
- Charlotte area, North Carolina
- USDA Zone
I’ve got a little lemon tree and pH 7.6 water. It did ok this year, but it’s not thriving. I’m thinking of repotting it in 50-50 kanuma (acidic substrate typically used for azaleas) and pumice next year.
In California, our irrigation water out of the tap was pH 8.0 - 8.5. Rainwater is pH 5.0 - 5.5. You can imagine the pH swings my trees would experience when they would go from eight months of straight irrigation water to the first heavy rainfall in the fall. This is the acidifying fertilizer I used:
Super Iron 9-9-9
Note what they say in the description: This special formula will help counteract alkaline soil and will enable plants to overcome iron-induced chlorosis. No mention of magnesium. And they shouldn't really have said "Iron-Induced Chlorosis". What they should have said was "Chlorosis due to LOW Iron" (but I think people get the point).