I would like to know how long before I notice that my planting is solid and firm. I am planting trees and roses around my house and my parent's home?
While I am not an expert on trees and roses, since most of the foods I am planting in my backyard gardens are for eating, after 2 to 3 weeks is when most of my plants started to take shape.
You can ask about both at gardening centers (Lowes.com, HomeDepot.com, Walmart.com) but most, especially Walmart have bad customer service.
You can also find natural gardening centers by going to google.com and put in your city name and the words "Natural Gardeners". Many cities have gardening clubs for plants, herbs and flowers. You can also find flower classes in continued education classes at night.