Vegetables need 6-8 hours of sunlight. But when the sun gets too intense you break out the Coppertone, right? Yeah, kind of.
Now don't get all worked up that you have to lather each vegetable up with SPF 50 (which you might enjoy doing too much). Instead find a bed sheet to throw over the plants during the hottest part of the day. Just make sure no one is in the bed when you nab it.
Keeping in true form of the old saying "it takes $80 to grow $10 worth of tomatoes" you might want to pony up to some shade cloth.
Shade cloth is a UV woven material that casts different amounts of shade from less than 50% to more than 75%. If you live in the Mojave the higher amount of shade might be needed. If you live by coast you're probably rich but your plants may only need 52% shade it a lower number. You have to play with it for a while until you get the right one.
Unlike the sheet that gets draped over your plants shade cloth is a little more uppity and is best supported with some uprights so it doesn't settle on the plants. Kind of like a small version of a patio or canopy.
The best part of using sun cloth is it's reusable each year. If you do a good job supporting it, like you do that deadbeat kid which still lives at home, you can leave it up for a long time and unlike that kid it'll be grateful.
Oh, and don't rule out using shade cloth for winter gardening. It's awesome for frost protection. And as we know protection is important ergo the reason that kid still lives at home.
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