Posted: 23/04/2014 at 11:22
I think the amount of rain we've had may leave lots of plants a bit hungrier this year.
Guessing most outdoor cropping plants will need a bit of extra nosh. Indoor and potted plants rely on top ups. Plants do give us hints by how they leaf up.
give me nitrogen: pale green all over
give me potassium: yellow edges and tip and leaf curls under
give me phosphorus: top leaves start to brown and lower leaves yellow
The micro nosh is trickier : calcium loss makes baby leaves hook, sulphur loss makes the veins yellow and magnesium loss causes yellow tips and edges - but the bit near the petiole (stalk end) stays green.
I like your thinking bookmonster- Seaweed extract is a fantastic fixer Of leaf probs.