^^ That copy and paste job above this post is for use with coco coir.
You can use Canna A + B in soil at 6.5 to 6.8 ph without probs. I believe you said you were in soil in your other post.
Although ph doesn't matter much in buffered soil (what type of soil you are using is unknown to me) I wouldn't mix it too far off of recommended soil ph.
How about don't defoliate and they won't have to recover. Yeah yeah, I thin out, lollipop and shit but I don't defoliate.