Similar Questions

S AU
02:41PM, 20 Oct 2009
Answer: Spray the foliage regularly with Triforine, Ros...
Category: Roses
Expert
02:41PM, 20 Oct 2009
Toni
09:11AM, 22 Oct 2009
Answer: Hardenbergia can develop leaf spots which can b...
Category: Diseases
Expert
09:11AM, 22 Oct 2009
Nhung
Black spots on roses.I have Iceberg roses. I did exactly what you advised. After prunning in winter, I sprayed with Lime Sulfur. I apply cow manure , Osmocote , Dynamid lifter and Seasol. From early Octorber I sprayed Rose Shield. After 2 weeks, I rep

What should I do , Please help me?
My Email address is
trinhsat6@bigpond.com
Your respecfully
Nhung Day

Submitted: 01:58PM, 24 Oct 2009
Answer: Rose fungicide sprays will only work if the roses are healthy and properly fertilised. If soil pH is too acidic or too alkaline fertilisers may not be completely effective. Weak hungry plants will always have fungal problems and sprays are less effective. Roses need full sun position all day. A complete rose food used at least twice a year will make the plants stronger and we also recommend using sulphate of potash every month during the warm months and garden lime once a year. The potassium and calcium make the leaf cells stronger and help prevent the diseases. Regular applications of liquid seaweed also raise the immune responses in the plants.

Roses require a lot of nutrition so don’t hesitate to throw some compost or rotted manures or soluble liquid fertilisers every now and then.

Never spray if the temperature is approaching 30 degrees or if the soil is dry. this will cause scorching.

Category: Roses
Answered: 07:19AM, 06 Nov 2009

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