Rosa "Freedom" in the rose garden at the Dunedin Botanic
Garden. Photo by Linda Robertson.
This is a tough time of year for your roses, especially
after the summer we have had. To help maintain their health and
vigour as well as extend the flowering, it is best to keep up
with a few basic tasks.
Deadhead
Ideally, deadhead daily to encourage more blooms.
Cut just above a five-leafed branchlet.
Practise good garden hygiene.
Remove any fallen leaves and spent flowers.
Add this material to the rubbish bin, not the compost pile,
so as not to transmit pests and diseases.
Continue with weeding and push hoeing of the garden beds.
Fluff up the soil around the rose bushes as this helps to
aerate the soil, reducing compaction around the base of the
bushes.
Watering
Give a good long soak, early in the morning a couple of times
a week.
Fertilising
Add a small handful of Nitrophoska Blue around the drip line
of the roses.
Other tasks that can be carried out include:
Spraying
Spray regularly and alternate the sprays that are available
to use.
Check the roses prior to spraying to see what the main pest
and disease problems are and spray accordingly.
Organic controls
Many products are available now - check the choices at the
local garden centres.
Companion planting
Companion planting is the planting of different crops in
close proximity to assist each other in nutrient uptake, pest
control, pollination and other factors necessary to increase
productivity. There are lots of options for planting to
assist with maintaining high plant health - you just need to
decide what plants suit your style of garden.
• Linda Hellyer is curator of the rose garden at the Dunedin
Botanic Garden.
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