You should allow the soil to dry thoroughly between waterings...overwatering is the number one killer of jade plants! Fertilize 3 times in summer only, preferably with a 10-10-10 mixture. It's best to pot jade plants in clay pots for better air movement in the soil and to keep it bottom heavy (they often grow onesided and topple over). Prune it as necessary to keep it shaped nicely.

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I wouldn't say they "like" extremely hot weather, but they can usually handle it. You can actually let your jade plant go without water until the leaves begin to dull, but this stresses the plant, so I would water at least once or twice a week in hot weather, and keep an eye on the leaves...if they start to look dull, water more often. Jade plants do best in bright light, but not direct sun, so if you have it outside, I would provide it with afternoon shade if possible.

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