Powdery mildew on acanthusHi goyers
By Sarahm
United Kingdom 
Powdery mildew on acanthus
Hi goyers, seeking your advice...the acanthus plants in my garden are on clay soil and have developed powdery mildew, should I spray the leaves or do I need to cut right back to avoid risk of spreading to nearby roses and rhodendron ? Thanks
2 Jul, 2015
Answers
Agree with answer above, but it won't hurt to spray with 1 part milk to 9 parts water as well, cows milk that is. Sounds daft, but it works against powdery mildew.
2 Jul, 2015
Shouldn't affect your rhododendron
2 Jul, 2015
Thanks all and intrigued by the milk/water mix, will need to try it!
2 Jul, 2015
Mildew is usually associated with dryness at the roots, so give the plants a good soaking.
2 Jul, 2015