Walnut trees are large deciduous trees belonging to the genus Juglans. They are known for their valuable timber and edible nuts. Outputs Juglone Functions Tree Deciduous Phosphorus accumulator1 Potassium accumulator1 Calcium accumulator1 Footnotes Gaia’s Garden - A Guide to Home-Scale Permaculture, 2nd Edition Table 6-2 ↩ ↩2 ↩3