Be sure to feed apple trees at the same time to support their leaf growth and fruit production.
Or too much fertilizer may have been used to encourage leaf growth.
This is usually replaced during the spring-summer flush of leaf growth.
Nitrogen, usually in the form of nitrates, encourages leaf growth and will be stored by the plant until the following spring.
This often reflects increased leaf growth near the end of the season.
The flowers appear in spring at the same time as the old leaves are being shed and new leaf growth starts.
Encourage leaf growth by giving the plants as much light as possible.
Don't give them too much nitrogen, which encourages leaf growth and will shade the fruits.
One is to anchor the bulbs so they can support the leaf growth and flower stalk.
Branch and leaf (or needle) growth in trees is also large-scale in nature.