Acidic fertilizer will not work on your Buddleias.....but the better the soil, the better the plant.....which may give you better looking flowers.

You can make the soil more acidic by adding sulphur. I know that the color of French hydrangeas is determined by soil PH - acid soil makes blue flowers, alkaline makes pink flowers, neutral makes purple ones. I've never heard of that being the case with butterfly bush. Many of the pictures you see in catalogs and on-line are enhanced to make the flowers look more like the desired color. Most butterfly bush flowers are different shades of purple - the white ones and yellow ones being the obvious exception - but nurserymen always want to have the first true red one, or true blue one, or true pink one. Another important factor is heat. My Ellen's Blue is a vibrant shade of almost true blue, only a slight hint of purple, in springtime. Now, in this summer heat, the flowers have faded. My roses do the same way - vivid colors in spring, pallid ones in summer. So, if you've been having hot weather in your area, yours will improve this fall and next spring. Sherry

butterfly quilt pattern Image link:

Congrats! Being an avid gardener and photographer of butterflies myself I had gotten fed up with hoping that every time I would go to Botanical Gardens and other places getting hit or miss sightings of butterflies. So I decided to plant my own Butterfly Garden. One plant I knew that I had to have in my garden was Milkweed. Plants are expensive and honestly the seeds are expensive. I found one website that actually sold Milkweed seeds by weight instead of count. I was getting 75-100 seeds per packet. I also ordered a ton of other seeds from them but here is link to there Milkweed.