If you live near the sea, seaweed is really fantastic.
You have to
stack it for a month or so for most of the salt to be washed out. In
fact, if it is gathered in a dry summer, you will have to water it. It
really does produce heavy crops. If you feel tempted to bring
some back from a holiday by the sea, it may be worth remembering
that to be really effective you have to apply 12lb (6kg) per square
yard (metre). Even if your car will carry a hundredweight of it, you can
only fertilise ten square yards, and of course you may well find
your family refuses to appreciate the odour of decaying seaweed
at close quarters.
Preparations from a seaweed base for foliar
application are available from garden centres. We often concoct
our own liquid mixtures using well rotted manure and these are
particularly effective if there is a dry spell and the plants are not
able to draw all the required benefit from the soil. These liquid
feeds are not a substitute for well-dug-in manure, just a helpful
supplement. If you apply a general fertiliser to growing crops but
do not dig it in, just sprinkle it on the ground — the rain will
gradually water it in and it will reach all the roots instead of
bypassing them.
seaweed as fertiliser