Hi all,
Terrestrial plants <"show a characteristic purpling"> when PO4--- is deficient, but I'm not sure what happens with aquatic plants.
cheers Darrel
It always takes a long time for phosphate (PO4---) deficiencies to show, because PO4--- is extremely mobile within the plant and it will continually be recycled it into new tissues until it really runs out. It also means that if you plants do become severely phosphate deficient, they perk up pretty quickly once it becomes available again.The lower PO4 dosing mentioned in post #48 is not showing any effect - neither positive or negative.
Terrestrial plants <"show a characteristic purpling"> when PO4--- is deficient, but I'm not sure what happens with aquatic plants.
cheers Darrel