06/07/2024
Q) What do gardeners and those with stubborn digestive tracts have in common?
A) Pruning.
Alright, alright. Settle down! We're talking FORMATIVE pruning.
This is the process of shaping a tree when it's young. 1-5 years old or thereabouts. Before the tree has reached a size where removing branches is suddenly a major undertaking. There are many reasons why formative pruning is recommended:
- When the branches are small, the cuts, and therefore wounds, will be small. (Jeez, check out Einstein over 'ere!) Small cuts heal faster, and have a lower risk of infection.
- You can establish a good framework of branches to suit your tree's intended purpose: eg. perhaps you want to create a low and open branching structure in a fruit tree, or create a single trunk for a narrow space.
- You can eliminate poorly-growing branches that are likely to cause some serious issues as the tree matures.
And this last reason brings me to this Olive. A primo example of a terrible branch structure that will only get worse over time: codominant stems. This is two or more stems of roughly the same diameter, forming from the same point on the trunk.
See these two stems growing parallel to each other? Like all of Rupert Murdoch's recent marriages, this is a very weak union, doomed to failure. See the crevice in-between them? This is what you call an included union, where the bark is folded inside, or 'ingrown'. Over time, as the branches develop, they will push each other apart and split in twain. (More William Tell's apple, less Shania.)
A tasty visual representation of co-dominant stems with included bark is the Chinese Cruller/Youtiao/Oil Sticks. Two delectable stems of roughly equal size with a weak, ingrown, bready union. Very easy to tear them apart and dip them in condensed milk.. Err, what was I saying again?
Oh yeah.. So, if you see a structure like this on a young tree at a nursery, avoid it! Ideally, a tree like this would never be for sale. However, one may slip through quality control and end up in your garden. So while the offending branches are small enough to be easily snipped off without the use of a chainsaw, save yourself some future pain and carry out a little formative pruning of your own.