Real World Gardener Rose Scale in Plant Doctor

February 22nd, 2015

 REAL WORLD GARDENER Wed. 5pm 2RRR 88.5fm Sydney, streaming live at and Across Australia on the Community Radio Network.<?xml:namespace prefix = "o" />


Real World Gardener is funded by the Community Broadcasting Foundation (CBF).

The complete CRN edition of RWG is available on , just click on 2RRR to find this week’s edition. The new theme is sung by Harry Hughes from his album Songs of the Garden. You can hear samples of the album from the website


with Steve Falcioni general manager of

As flowers go, roses are probably the most popular garden plant and cut flower.

Who doesn’t like receiving a bunch of roses?


Rosa Cornelius photo M Cannon

As gardeners and horticulturalists go, growing roses can be problematic if you’re trying to grow them out of their comfort zone.

The wrong spot or climate can make some problems seem hard to eradicate.

The scale itself is 203mm big, roughly circular and off white in colour. Rose scale stands out against the brown stems and can get a complete covering of the stem.

If you’ve only got one rose in a pot, then scrubbing off the scale with soapy water is probably all you need to do but you may not get all the crawlers and the problem will persist.

Rose scale

Or if you find a stem that’s just covered with so much scale that it’s practically white-get out the scrubbing brush or just prune it off.

Certainly a good scrub can break through all the layers if it's badly infested but then treat with eco Oil.

Otherwise, applying horticultural oil based on botanical oil is the best treatment for rose scale because it does the least harm to beneficial insects.

Also botanically based oils can be sprayed onto plants at higher day temperatures- up to 350 C

If you have any questions about scale or rose scale or a photo of a plant you want diagnosed, send it in to or write in to 2RRR P.O. Box 644 Gladesville NSW 1675.

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