8. Add Water-Releasing Crystals
If you travel a lot and worry about the health of your plants while you’re away, a fast, affordable, and practical solution is to stock up on little crystals that soak up and then gradually release water. Specific brands include Water Crystals and WaterSmart Crystals, which are sold by garden centres. When you add water to these polymer granules, they absorb many times their weight in water. By mixing them in with the soil in your plants’ containers and then watering, the crystals soak up and then slowly release the water to keep your plants watered while you’re gone.
Be sure to follow directions on the label, because putting more crystals in a container is not necessarily better. Since they expand when wet, too many crystals can swell up and damage your plant or even push it out of the pot.