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Selwyn Times: June 26, 2019

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SELWYN TIMES Latest Christchurch news at www.star.kiwi<br />

Wednesday <strong>June</strong> <strong>26</strong> <strong>2019</strong> 25<br />

Gardening<br />

HEALTH: Hard pruning roses will produce more vigorous new growth.<br />

Protect your pruned roses from frost<br />

THERE IS more written about<br />

pruning roses than almost any<br />

other aspect of their care.<br />

Yet, why do we prune our<br />

roses?<br />

Here are a few key reasons:<br />

Encourage new growth and<br />

more blooms. Maintain the<br />

health of the rose by removing<br />

old wood, improve air circulation<br />

within the bush.<br />

Maintain a specific shape,<br />

especially for climbing and pillar<br />

roses, and those that are pegged<br />

down.<br />

Not all roses have the same<br />

need to be pruned, some just<br />

need an annual “going over’’<br />

after flowering to remove the<br />

dead wood. Other roses, most<br />

notably the highly bred hybrid<br />

teas and floribundas, need regular<br />

pruning. If you garden on a<br />

light, sandy soil then prune your<br />

roses only lightly as they will not<br />

be able to support the vigorous<br />

new growth that hard pruning<br />

encourages.<br />

The time to tackle pruning<br />

is in the winter while they are<br />

dormant, before they burst into<br />

growth. In some areas of New<br />

Zealand, and in some seasons,<br />

there may seem to be almost<br />

no period of dormancy and so<br />

you must choose your moment<br />

carefully. So do not prune when<br />

there is still a risk of severe frost,<br />

as any new growth will be frosted<br />

and die back.<br />

You will have to cut back to<br />

the next bud, reducing the plant<br />

further.<br />

Most bush roses flower on the<br />

current year’s growth.<br />

A hard prune will produce<br />

more vigorous new growth.<br />

Remove the oldest cane on the<br />

plant; this keeps the bush fresh<br />

and vigorous.<br />

Then reduce thick, strong<br />

stems by about half their height.<br />

Thin canes need to be cut back to<br />

one-third their height.<br />

Try to keep the centre of the<br />

plant open. A mess of spindly,<br />

twiggy growth in the middle<br />

of the plant restricts light and<br />

air circulation, encouraging<br />

disease.<br />

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