To keep your plants alive, create a self-watering system with a wick strung from a water jug to the pot. The water will travel along the wick from the jar to the plant.
The plants will then be able to use all the water they need, and the water will continue replenishing from the jar via the wick whether you’re on vacation or not.
To make the system, cut enough cotton string to run from the bottom of your jar to your plant pot. Tie a paperclip on one end of your string to weigh the string down in the water.