When egg cells are fertilized from the same plant is called self-pollination. Self-pollinators include certain types of fruit trees. Other types of fruit trees require two for pollination.
Two animals that help plant and trees with either pollination or seed dispersal includes birds and insects.
20ft apart
whats pollination problems with fruit trees
200 meters
For optimal growth and spacing, plant emerald green arborvitae trees about 3 to 5 feet apart.
For optimal growth and privacy screening, plant Thuja Green Giant trees about 5 to 6 feet apart.
You will need two apple trees, but for best fruit production you should use two different varieties (see pollinization chart at http://www.acnursery.com/apple_pollinizer.pdf).
The spacing for dwarf bing cherry tree is 10-20 feet. Also most sweet cherry (Bing) are not self pollinating they need a different cherry tree like black tratarian, van, republican, Stella nearby.
Olive trees are usually self-pollinating, but they can benefit from cross-pollination with other trees to increase fruit production.
I plant them at least 14' apart, a bit more is better.
Arborvitae trees should be planted about 3 to 6 feet apart to ensure proper growth and spacing.