5A - Watering Question: Temperature['s] up which is suitable for plants; how often watered?Posted on 13 May 04:42
Watering Question: Temperature['s] up, which is suitable for plants, how often [should the plant be] watered?
This question was specific to an outdoor Bonsai; climate unknown, but this answer is good general advise for most Bonsai, kept outdoors during the summer.
Water needs depends on the climate; temperature & humidity where you live; what growth stage the plant is in.
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; more in very high heat.
The watering schedule will vary with the size pot, type of soil, the type of tree and individual needs of the tree.
Evaluate the tree's water requirements continually during the summer; adjust your watering schedule to accommodate, as water need changes.
In really hot, dry conditions with low humidity, you may even need to water twice a day in high summer.
Water should be applied until it begins running out of the holes in the bottom of your pot. A good rain is usually a sufficient watering for the day. Look for clues to help evaluate watering needs at a glance.
Example: I keep pebbles and water in the drip trays under the pots. Where I live, with the plants I have, if the pebbles look dry; the plant probably needs water and I follow up with a closer check.
You should look for similar clues, including soil color, feel, etc; as you get to know your plant/s. Such clues can be helpful in judging if your plants need off scheduling watering during the heat of summer.
Keep in mind, in summer, it is generally safer to give a little extra water, rather then not enough.
During winter when plants need less water; clues at a glance, can also help you avoid over watering.
If you are still unsure, you can use a moisture meter.
Hope this helps