My yellow shrub daisies were blooming great but now they have not bloomed in a good 2 1/2 months. I believe they had spider mites and I sprayed them but need to spray them again this weekend. The foliage looks good, but I noticed the bottom of the plants had a grey look. Could the spider mites keep them from blooming at all?
Yellow Shrub Daisies
Certified GKH Gardening Expert
Treating the plant with neem oil should help with eradicating the spider mites. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
While mites can occasionally affect blooming, this isn't always the case. You may need a bit more phosphorus, which helps promote blooming. this article should help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm