Shade in the garden questions.

[dixiegrrrrl]

1. Until and unless your trees get big enough

you might want to look into shade cloth.
The cloth varies from white to black, and can used directly ON raised bed, and draped around tomato plants.
Check out "row covers" as well as "shade cloth".

Down here in the hot South, I use old lattice boards, titled up against one wall, to protect the potted tomatoes . Really works fine.