raw seaweed on the garden
know a beach where there is a lot of washed-up plant material mixed
with broken-down seaweed. It looks like a fine mulch and I used
to get bags of it and spread it on the garden. Now I have been told
that the sea salt in this mulch is bad for the soil and detrimental
to plant growth. Is this true?
you could end up with a build-up of salts in your garden if you
use this washed-up plant material. You may find sensitive plants
fail to thrive.
If using seaweed for
the garden as a mulch, soak it in fresh water overnight first to
wash out the salt.
by Dr Dan Blanchon from Unitec's Diploma in Sustainable Horticulture and Bachelor
of Resource Management.
with permission from NZOOM Home and Garden content,
from the previous
The views expressed here are not necessarily those of the RNZIH