It is important to water Bonsai early in the day before the temperature lowers in the evening. The type of plant you have will determine the watering regime you need to undertake. How much moisture the plant needs is a very important factor and you should always water the soil as thoroughly as possible to ensure that all the roots get a good watering.

Because the sun is at it’s brightest and strongest between the hours of 11 a.m. and 2 p.m. you should try as far as possible to keep your Bonsai out of the sunlight between these hours. It is also important to remember that electrical items around the house give off a very humid heat that can damage not only the leaves of you Bonsai but can also dehydrate your plants or trees and eventually kill them. It’s also important to alter your watering schedule to meet the demands of increased light, heat and humidity.

The process of repotting a Bonsai tree is one that you should take seriously and follow these simple instructions:
First, you should tidy the tree by carefully pruning off any unwanted, long branches. Also, make sure the tree has been under cover for a few weeks if it is an outdoor Bonsai, this way the soil will be relatively dry. Once you remove the tree from it’s pot you will be able to see whether it really needs repotting. If it is root bound then you should repot it, however, if there are another few inches of room so the roots can grow a little longer then you can carefully replace the tree in it’s original pot and continue as normal.
You should remove surface soil from the roots either by hand or using a nylon scrubbing brush. Brush away from the trunk and be careful not to damage any of the roots. Removing the loose soil will give the Bonsai tree a healthier look and feel. Once you’ve removed most of the soil in this way, you can use a small, fine bristled paintbrush to remove the soil stuck in the roots or that has collected in the roots.
Use a Bonsai fork to comb out the roots. Do this by combing out the roots from underneath and then use scissors to prune up to a third of the roots and then cut out small wedges around the root base to allow fresh soil to collect and keep your Bonsai healthy. Add a layer of grit to the bottom of the pot and then add the Bonsai compst of your choice.
Take the time to position your Bonsai tree in the pot and then push a little more soil into awkward places. Complete this as often as you need to as mentioned above.

Pruning is necessary to maintain (or refine growth to obtain) the right shape of a bonsai and encourage new growth. Some plants naturally respond well to pruning, regardless of how intense, whilst other plants can find it hard to recover, especially when pruned at the wrong time of the year.
To prune correctly you must find out the type of plant your bonsai is and research when the best times are to prune old and new season growth. Generally, new growth is pruned during the growing season to maintain the shape of the bonsai, whilst pruning of hard wood (old season growth) is done in mid-autumn.
The main factor in maintaining bonsai is the removal of all but the most important parts of the plant. Bonsai is all about the reduction of everything just to the essential elements and ultimate refinement.