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Bonsai trees are often tropical or sub-tropical in origin, therefore we should try to recreate such conditions indoors, i.e. try and keep the humidity around them quite high.
The ideal minimum temperature should not fall below 50°F (10°C).
Trees indigenous to the UK are generally 'frost hardy' and can therefore be left outdoors.
However, ensure the root system is not allowed to freeze.
Position; This is probably the first and most important consideration after purchasing your tree.
The Bonsai needs to be in a position so it gets plenty of natural light, but avoiding direct sunlight as this may cause the leaves to scorch and the tree to dry out rapidly.
The area must be well ventilated but free from draughts.
Do not subject your tree to direct heat e.g. on top of the TV, or heater.
Watering; The immersion method;
Immerse the tree/s in tepid water daily to approximately 1 inch (25mm) above the pot rim, and allow to stand until the air bubbles stop. (do not use cold water this can shock the tree)
Always keep the compost moist and do not allow it to dry out.
In the event this happens leave the pot standing in water overnight.
n.b. In areas where the water has a high lime content it is better to water with distilled water or rain water.
Humidity; Spray the leaves often with tepid water.
An added advantage is to stand pot and tree on a drip tray filled with pebbles or grit and water this should create the necessary humidity.
n.b . Do not leave the pot sitting in water
Feeding; Liquid feed and spray the foliage once a fortnight during summer and once a month during winter.
Mix the feed with water to the recommended strength as per the manufacturer’s instructions
Pruning; Allow new shoots to grow 5 or 6 leaves then cut back by 2 leaves growth. If any new growth spoils the overall shape of your tree cut it off!
Re-potting & Root pruning; Check your tree every year (circa Week 12)
If the tree is root bound open the root ball and cut off the bottom 1/3rd of the root and re-pot in fresh compost and water in well.
You may find with some species, this only needs to be carried out every 2 years.
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