Cottonwood- Annual Care?
I just purchased a home that has 9 mature Eastern Cottonwoods. 4 ofthe trees are about 75 to 85 ft. I would like to know what, if any fertilizer and pesticide should be given? I found a site that actually sells somethimg they call "Annual Care Kit for Cottonwood". See link for website. This kit is $27.95 per kit for 1 large tree or 2 to 3 small trees. I would need about 7 kits $210 ? I was just wondering what the best/most economical route would be? Thanks. I'm in Michigan and have clay soil and some of the trees are growing just outside the edge of a wetland.
Here is a link that might be useful: Cottonwood fertilizer kit