Not long. It depends on type of plum tree, how much water it gets, type of soil, sunlight, pruning, those sort of things.
A purple plum, Prunus cerasifera, can live for as little as 20 years and it will have got to full size long before that.
While an avocado propagated by seed can bear fruit, it takes roughly 4-6 years to do so, and the offspring is unlikely to resemble the parent cultivar in fruit quality. Rootstocks are propagated by seed (seedling rootstocks) and also layering (clonal rootstocks). After about a year of growing in a greenhouse the young plants are ready to be grafted. Terminal and lateral grafting is normally used. The scion cultivar grows for another 6-12 months before the tree is ready to be sold. Clonal rootstocks have been selected for specific soil and disease conditions, such as poor soil aeration or resistance to the soil-borne disease caused by phytophthora (root rot).
http://en.wikipedia.org/wiki/Avocado
Growing a plum tree from seed requires a process called, stratification which requires two to three months, then about a month or so before the plant breaks the surface.
Related Information:
After about five years, it will begin to bear fruit. This method usually won't produce fruit like the one that the seed came from, either. Most modern varieties grow on grafted trees, and their seeds don't reproduce truly.
It takes 4-6 years for a pear tree to bear fruits.
With proper care and maintenance average 15 to 20 years. Rare exceptions up to 30 years
About 3-5 years if it is kept up with.
It can take up to 3 years
2-3 years
It is a light green, edible plum like fruit, that grows on a similar tree
Yes, how long?
African pygeum is an evergreen that grows to 150 ft (46 m) and is a plum tree.
it could
You dig a hole and put the plum tree into it.
In a plum tree.
It may be aphids.https://www.gardeningknowhow.com/edible/fruits/plum/common-plum-tree-pests.htm
spraying a plum tree with what? against what pest/disease?
No.
Yes, but there is no guarantee tou will get a tree with worthwhile plums.
A Plum tree.
It is possible but it would be a waste of your time.