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Selwyn Times: March 31, 2021

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Wednesday <strong>March</strong> <strong>31</strong> <strong>2021</strong> <strong>Selwyn</strong> <strong>Times</strong><br />

Latest Canterbury news at starnews.co.nz<br />

GARDENING <strong>31</strong><br />

Time to tackle the<br />

tricky garden pests<br />

AUTUMN DAYS herald a<br />

change towards cooler weather,<br />

the soil stays moist and there’s<br />

colour everywhere.<br />

It can also be the best season<br />

for planting, because new plants<br />

have time to settle in before<br />

they’re faced with their first<br />

summer.<br />

Fertilising<br />

Spread organic pellets around<br />

shrubs and flowerbeds.<br />

Feed citrus and other fruit trees<br />

with citrus food.<br />

Clear away weeds and grass<br />

at the base and spread a layer of<br />

organic mulch over the root area<br />

(keeping well clear of the trunk).<br />

Remember, feeding with high<br />

potash fertilisers encourages<br />

blooming and, even more<br />

importantly, builds plants’<br />

resistance to disease (essential<br />

at this time of year when fungal<br />

problems are rife).<br />

Lawn care<br />

Give lawns a feed with a longlasting<br />

fertiliser. Early autumn<br />

is the ideal time to rejuvenate<br />

tired lawns. Spike with a fork or<br />

a purpose-designed lawn aerator<br />

PESTS: Caterpillars and white butterflies will destroy<br />

cabbages.<br />

and oversow with a lawn seed<br />

blend.<br />

Pest control<br />

Watch out for the autumn<br />

influx of caterpillars.<br />

White moths and butterflies<br />

attack cabbages, cauliflowers,<br />

rocket and their relatives,<br />

vine moth caterpillars are<br />

demolishing grape leaves, flax<br />

caterpillar is stripping leaf<br />

sections of leaves, leaf rollers are<br />

knitting leaves and emerging to<br />

graze on apples, feijoas and other<br />

fruit.<br />

Use low toxic options for<br />

controlling most caterpillars.<br />

Grass grubs and porina, too, can<br />

destroy lawns.<br />

Treat weeds<br />

Many annual weeds are<br />

approaching maturity and should<br />

be removed before they have the<br />

chance to spread their seeds.<br />

Other autumn tasks<br />

Prune the hydrangea stems that<br />

flowered last summer.<br />

Reduce clusters of camellia<br />

buds to one per stem. Divide<br />

perennial plants and spread to<br />

other parts of the garden.<br />

After their leaves have fallen,<br />

spray deciduous fruit trees (eg<br />

peaches) with a copper fungicide.<br />

Good coverage will clean up<br />

the remains of summer pests and<br />

diseases. Move cold-sensitive<br />

container plants into shelter.<br />

MOISTURE: Mulch shouldn’t be used just to make the<br />

garden look tidy.<br />

Use mulch judiciously,<br />

don’t make volcanoes<br />

MULCH, IT seems, is the new<br />

compost.<br />

There’s nothing wrong with<br />

mulch when it’s used judiciously,<br />

but creating ‘‘mulch volcanoes’’<br />

around your trees is a very bad<br />

idea, especially when it’s done<br />

mainly for aesthetics.<br />

The root zone of an established<br />

tree extends beyond its drip<br />

line, so mounding the mulch<br />

against the trunk does little for<br />

the roots, except cause roots near<br />

the trunk to grow into the mulch<br />

volcano.<br />

The piled-up mulch can soften<br />

the bark of some young trees and<br />

invites insects and diseases.<br />

The lower trunk, unlike the<br />

roots, cannot easily survive<br />

long-term with the constant<br />

moisture the volcano traps—it’s<br />

the equivalent of planting a tree<br />

too deeply.<br />

Bear in mind that the main<br />

reasons for mulching are to<br />

retain soil moisture, suppress<br />

weeds and moderate soil<br />

temperatures — not to cover the<br />

garden so it looks tidier.<br />

10% TO<br />

50%<br />

OFF ALL PLANTS*<br />

AUTUMN<br />

*While stocks last!<br />

WEEKDAYS 8:30–5PM<br />

MARCH 29 TH –APRIL 9 TH<br />

WWW.GREENLINC.CO.NZ<br />

Open Easter Monday! Closed Weekends.

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