mould on Astelias
have two astelias that seem to be rotting away at the base, growing
a furry white mould at the base of each leaf. They are not keeping
their normal silver colour and basically seem to be giving up their
will to live. They're planted in a well-drained area, get the afternoon
sun and water when I can remember to do so.
prefer a cool, moist, peaty, free-draining soil. Semi-shade is ideal
avoid the hot midday sun.
When planting, take care
not to bury the crown as this will cause the rotting you describe.
Alternatively, soil or rotting leaves falling amongst your astelias'
leaves will have the same effect.
Astelias require regular
watering, especially during dry periods. Mulch plants to help conserve
It is possible your astelias
are suffering from phytophthora which is a root rot and can be caused
by irregular watering. Unfortunately, there is little that can be
done if root rot is the problem. A spray called Ridomil is effective.
Mancozeb is a good protectant spray but will have no effect once
the disease is present.
Remove infected plant
material and burn or dispose of in the rubbish bin to prevent the
disease spreading. Do not replant astelias into the same position.
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