I use Gardentech Concentrate (the red bottle). I mix 3 Tablespoons to 1 gallon or 3/4 Tablespoon to a quart. Reading over all the plant types it looks to be ok to use on most anything that way.
I have only used it as a spray mainly on plant trunks or stems to prevent or in some cases(like a new plant) to treat fungal problems. Prevention would be a late Fall application and a Spring application just before buds open. For actual treatment I would follow up bi-weekly coupled with a Sulfur solution watered in until the issue is resolved.
Honest I don't use it a lot and when I do I find it is mainly on plants that prefer less sun and damp substrate. I do however also use it as above on Fruit trees but never more often. I never tried watering it into the substrate. For things like Cedar Rust I water in diluted Sulfur with good results and find it far less expensive although efficient and natural.
I always measure as closely as possible when mixing. If I where to see a problem with any chemical I can then call their support and resolve the issue with confidence.
So;
Average out the top dosages for all plants.
Spray only.
Dormant as a preventative Fall and Spring.
Scheduled for treatment.
Measured as close as possible.
Not certain what brand you use but that is what I do
Grimmy
