What is Twickle Purple Lavender and does it really prevent blackspot in roses?
By Dinahmyte
Surrey,
United Kingdom 
I visited a garden on show and the notes stated that Twickle Purple Lavenderhad been planted to prevent blackspot.
23 Jun, 2009
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That's a new one on me - I shall be watching for any responses on this;-)
23 Jun, 2009