Homemade Hummingbird Food?
You dont need to cook the hummingbird food. I did for years until I found out it isnt necessary. Just mix and serve 1 cup sugar to 4 cups water (well water). They love it, and come back every year.
Getting Rid of Rats in the Garden?
You need a cat or two, and that will take care of the problem. I live on 2.5 acres and have 5 cats, no mice, rats, or moles. Works great!
Tomato Plant Turning Black?
I would say drainage problem and not enough soil.
What Kind of Tree is This?
Looks like Golden Rain tree.
What Are These Plants?
http://davesgarden.com/guides/pf/go/57941/
Where Can I Get Brugmansia (Angel's Trumpet) Seeds?
I have some White angel trumpet seeds I would be glad to share with you, just need to know where to send them.