have a Hydrangea quercifolia. Last year it was planted in
the shade, but it was hidden and couldn't be seen clearly. I moved
it after I had cut it back and now it has about half a day's sun.
It looks well, robust and it's a good size, but it hasn't flowered.
Please tell me what to do.
could be a couple of reasons for your hydrangea not flowering. Hydrangeas
flower on the previous season's growth, therefore this season's
new growth will flower next season. By cutting your hydrangea back,
you have cut out the flowering wood. Next season it should flower.
When pruning hydrangeas,
l like to wait until early spring when the buds start to swell.
This makes it easier to identify the fat, swollen flowering buds
as opposed to the slender elongated foliage buds. Prune to 1 cm
above the fat swollen buds.
If the foliage is lush
and green, this indicates your soil may be high in nitrogen
mulch, compost and lawn clippings are all good for the soil, but
are high in nitrogen. A side-dressing of Sulphate of Potash will
help promote flowering. Autumn is a good time, and then again in
early spring when the plant bursts into leaf.
Alternatively, use a
general garden fertiliser or controlled release fertiliser such
as Osmocote, applied now and again in spring as a side-dressing.
Hydrangeas like light
shade, a cool, moist, well-drained soil mulching is beneficial.
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