Understanding "Weakly, Weekly" Fertilizing
Houseplants in containers have limited root volumes. High concentrations of synthetic salts draw water out of root cells through reverse osmosis, causing burned root tips and brown leaf margins.
Feeding at low concentrations (50–100 PPM Nitrogen) during every watering while in active growth produces denser foliage and stronger root systems than shocking plants with full-strength doses once a month.
Frequently Asked Questions
What is PPM in plant fertilizing?
PPM stands for parts per million, equivalent to 1 milligram of elemental nutrient per liter of water (1 mg/L). It measures the true concentration of nutrients available to root hairs.
Should I fertilize in winter?
If your plants are under grow lights and producing new leaves, you can continue light feeding (50 PPM). If they are dormant due to low natural winter light, withhold fertilizer until spring.