Visual Guide
Calcium Deficiency.
Supplement with a chelated Cal-Mg product
← All problems
Photo
PhotoDeficiencies
New growth is distorted and curled, with brown necrotic spots on leaf tips and edges. Roots become stunted and fruit may develop blossom end rot.
Looks like this
- Curled, distorted new growth
- Brown necrotic spots on leaf tips and edges
- Blossom end rot on fruiting plants
Solve it with Vitaponix
How to fix it
- Supplement with a chelated Cal-Mg product
- Improve transpiration with steady airflow and moderate humidity
- Check and balance the rest of the nutrient profile
Why it happens
- Low calcium in the feed (especially in coco and RO water setups)
- High humidity reducing transpiration and Ca movement
- Excess potassium or magnesium causing antagonism
Prevent it
- Always use a Cal-Mg supplement when growing in coco or with RO water
- Follow the official feeding chart humidity targets for each flowering week
- Keep airflow strong over the canopy
Official feeding chart
- Target pH (official chart)
- 5.8 – 6.3
- VitaCal
- 1 ml/L, weeks 3–8
- Water temperature
- 18 – 21 °C
Doses and targets come from the official Vitaponix feeding chart. Vitaponix nutrients are plant nutrition, not pesticides or fungicides.