Outdoor Bonsai tree care. Light. Most outdoor Bonsai trees need sunlight for at least a few hours a day. Humidity. On hot days and in a paved place surrounded by walls the trees can suffer from low humidity. Watering and fertilizing. The most important rule is; never water on a routine. Temperature. Deciding on what is the best location to place your Bonsai trees can be hard, as several factors (local climate, time of year, tree species, etc.) should be taken.
Your tree may need watering daily if it is getting plenty of sunshine. Do not let the soil in the pot dry out and when you water the tree, continue watering until the water runs out of the holes in the pot. Water very gently using a watering can or an attachment for your hose that allows for gentle watering.
The watering of your bonsai must never be neglected. Apply water when the soil appears dry — never allow the soil to become completely dry. If your bonsai is receiving full sun, it may be necessary to water once a day. This schedule may vary with the size pot, type of soil and type of bonsai tree you own. All about growing, watering, requirements and winter care of outdoor bonsai plants and trees. This Christmas I received the gift of a bonsai tree, a rather daunting gift as I had no idea how to care for it. My only experience with bonsai was.