My 24 inch tall indoor jade plant has been doing well for 5 years. I water it every 10 days-2 weeks. Its main stalk is 1 1/2 inches thick and has 4 limbs off it. A few days ago it just bend over double. I watered it expecting it to pop upright by the next morning. It has not done so. Otherwise, it looks and feels normal. The soil tester says the soil is moist. Help! Dave
Watering on a schedule can lead to overwatering. It's best to check the soil before watering. During the winter months your plant will need a rest and take less water.
Here are some links that will help you pinpoint the cause.