Ahhhh, sorry to hear this. Crassula Ovata can certainly handle 80s! Mine were in full sun at 105...however, just like humans, they need to acclimate to the sun. Move it to bright shade for a week, then morning sun, then full sun. Unfortunately, the sunburned leaves are like the skin on your nose when sunburned...history.

The fact that your jades leaves are brown and scared tickles me because I thought the exact same thing when I gave Belvedere the ebola virus after spraying him with a sulphur based fungicide and leaving him on my windowsill. Big black pockmarks eating into his succulent leaves. I gave him a shot of liquified seaweed and he felt better, but the scars remain. He'll never let me forget it.

My condolences and good luck,
Bob

Tonia, don't give up just yet. I had 3 sunburnt cacti w/o any fatalities. In fact, as fall approahed, red leaves eventually blended in w/remaining foliage.
Acclimating is important, even for desert plants..I thought the same as you..didn't think cactus/succulents would burn..what a mistake..Toni

My jade is in full sun and it is red on the leaves all around the leaf. BUT there are very few leaves. I dont know if it is getting to much sun....needs repotting,or is dying? It is only 7-8in tall in a 4in pot..kept pretty dry..and full sun..no shade at all. in South Florida. Should I pot it up,put it in shade,water it even less? I'm stuck. Is the red line around the leaves sunburn? It looks pretty this way,but ti is sparse with leaves and not growing much at all.

Hi Floridabear..If it's the red line I'm thinking about on your Jade, this is a normal.
You ask about repotting..is your Jade rootbound? If so, then pot up a size. Use a well-draining soil.
I don't fertilize often, (once a month) during growing season which is from May-Sept. I use a cactus/succulent food then alternate w/diluted all purpose.
Though soil should dry out, water a bit more during hot days. Even Jades have their limits..(S)
Has your Jade always been red? There are different types, one in particular, called Autumn Sunrise, which w/good light turns and orange-red. It was listed on Ebay a while back, and beautiful.
Has your Jade been in the same spot all along, or did you move it to full sun? If you moved it recently, this might be the reason its leaves turned red. Do you have a pic? Toni

Red line in full sun is what happens with almost all jades. This is not a sunburn. A sun burn on a jade leaf is a brown circle of varying size and can go straight through to the bottom of the leaf. The leaf will never recover, but the plant isn't hurt one bit. Pull the leaves off. New ones will grow, possibly ever new branches.

Thank you all for your replies!
Thats exactly what it looks like. I wasn't sure if i should remove the leaves or not. I'll remove the most damaged brown ones, and leave the ones that are fairly burned, they are puckered but not brown.
I had been putting it out with my seedlings to harden them off, and i was leaving him in the sun just a little longer than the seedlings and forgot about him.
Its really strange how the sun didn't bother the real new & younger growth on him. I also noticed the seedlings that sprouted outside don't seem to be fazed by the sun either, compared to the ones that sprouted inside.
Again, thank you for the replies everyone!
Have a good evening!
Tonia