If the manufacturer cannot give you positive directions they should not be selling the product. The chemicals involved are very potent and if misapplied can either be totally ineffective (too little), or damaging to the bush/environment (too much). Call the 800 number again and DEMAND to speak to a horticulturalist at Bayer. Explain your dilemma concerning their instructions and if the answer seems logical, proceed with caution following the directions given to the letter. Get names of everyone you speak to, along with dates and times jotted down. I wish you success!

Moses

I would use the full dose in the mature plant and half the dose on the smaller one. It is tough when there aren’t very specific instructions to m follow but by lowering the dose you will be safe and the smaller plant can still get a good boost.

I do pretty much what dianela does. I dont measure anything though lol. I just kinda give the smaller ones less of the same concoction the bigger ones get (whatever fertilzer/brew they are getting that day). As long as they are well watered first, they will probably be fine, even if they get a little too much. I dont use pesticides except organic so there's that.