Bonsai Tree Dry Leaves

This is known as leaf burn.
Bonsai tree dry leaves. Watering the tree too frequently can cause it to become stressed and lose leaves while infrequent watering can dry out the tree and kill it. Dry crispy bonsai leaves. A dry and brittle bonsai tree is having trouble taking up enough water to stay healthy. Brittle branches foliage.
Bonsai soils are specially formulated to dry out slowly which is healthier for the tree. Water the bonsai tree when the top half inch of potting soil is dry to the touch. If packed into a container that is too small to house the root system properly your tiny fellows can become root bound. Alternatively like the conifers under watering a deciduous tree will caused the leaves to dry up and eventually fall off completely.
For deciduous trees like maples discoloration in the foliage could be caused by continued exposure to the afternoon sun. It might be the case that the dry brittle leaves of your bonsai are not related to under watering. Within days you will see the leaves of your tree wither and fall off or in case you have an evergreen its foliage will slowly turn yellow. To ascertain whether your bonsai is still alive make a small cut on the trunk or branches in a couple of places.
The reason for deterioration of the bonsai could either be under watering or root damage that prevents water. If the roots have dried up completely you can t save the tree. If you forget to water your bonsai until the soil dries out completely the tree s roots dry out and die.