Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
There are several formulas of Osmocote. Which are you using? What are the ingredients?
It is not true that plants prefer root uptake of nutrients.
Land plants and aquatic plants can take in fertilizers through the leaves and the roots.
Some plants prefer leaf uptake of some nutrients.
Diana Walstad, Ecology of the Planted Aquarium, p 104-118,
Western Fertilizer Handbook (Sixth Edition) p 166-167
Plants like Java Fern, Anubias, Bolbitis and mosses have roots that anchor them to rocks or driftwood, but do not take in nutrients.