Mineral
Deficiency Signs |
| MINERAL |
SIGNS |
USE ACCUMULATORS OR... |
| Nitrogen |
Small, pale leaves, poor crop and poor overall growth |
Compost; drainage; rotation |
| Phosphorus |
As nitrogen, plus late development of flowers and fruit; leaves blue-green
and fall early |
Compost; raise soil pH; rock phosphate |
| Potassium |
Stunted growth, scorched leaves, yellow between veins. spotting underneath |
seaweed; comfrey; rock potash |
| Calcium |
Leaf tips scorch and die |
Correct pH upward |
| Magnesium |
Green-veined old leaves with yellow between veins |
General compost, Epsom salt, dolomite limestone |
| Boron |
As Ca, poor root growth, poor disease resistance |
Seaweed. Avoid lime and nitrate. Borax |
| Copper |
Young leaves blue-green |
Cut out nitrate, seaweed foliar feed |
| Iron |
Young leaves go yellow between veins |
Compost to reduce pH |
| Manganese |
Old leaves fade |
Raise pH; improve drainage (do not compost) |
