Mark Reynolds wrote:
Leah Sattler wrote:hmm. I don't understand how the taproot thing could be true?? wouldn't you graft a desirable apple onto another apple tree? wouldn't all apple trees have or not have a tap root? just curious.
Apple varieties, (the trees are what I'm referring to here) are propagated from bud and stem (scion) grafts onto 'rootstock'. The rootstock comes from an apple tree that has good root structure, (a root cutting), although not necessarily great fruit. In other words, the commercial apple tees you see do not originate from seed. They are literally a "Frankenstein" (I don't mean that in a bad way) of a tree. They are composed of parts from other trees to create a new tree, that was not propagated from a seed. As such, this new tree will not/does not have a taproot that originates from a seed. However, because it is created from 'superior' root cuttings, I would suspect that a tree grown in this manner would likely be superior to a tree propagated from seed in terms of the root structure. Taproot notwithstanding.
Leah, Mark is correct, plus the trees you find in nurseries have to be held in a pot, and, according to the size of the tree you want to have in the end, You might want to have an M.27 an M.9 , a G, and M111 etc.
The rootstock [u]you choose determines the eventual height of the tree.[/u]
The rootstock will determine if the tree will reach a height of 20%, 40% 60% 80%
of the final height of a seedling tree, with the seedling tree reaching the full expectation of 100% of its height.
https://maplevalleyorchards.com/rootstock/apple-rootstock/
To support all the branches and the weight and the height of a full size tree, the seedling puts out a taproot which is in proportion. To withstand winds, it has to have a long anchor root, with other roots growing laterally.
But to harvest those apples
you will need a tall ladder. If you plant several, they will need to be spaced farther apart.
A number of rootstocks are the result of genetic mutations or serious selection that makes them dwarf, or at least a lot smaller, and there are advantages and disadvantages to each and every one. The scion, which is later grafted to the rootstock determines the cultivar, meaning the type of apple you get: Cortland, Lodi etc...
Once the tree grows in a nursery, it can also be further limited by the size of the pot it's placed in from the start. [We've all heard of the dreaded "pot bound" root ball, when a tree has been in the same pot for too long and the roots grow in a circle]. Avoid those like the pest because
they will be stunted and will never achieve their full potential. [Buy them "Bare roots", so you can see if it has lots of roots or not]. This also causes the roots to fork, so you will not have a long "taproot". The seedling, in contrast, grows unimpeded and needs to gain some height and will grow roots that match. They won't always grow a proper "taproot" is you imagine a carrot of a taproot with little filaments as side shoots: They will fork a bit too, but that is because although a seedling can grow roots unimpeded except by rocks or other impediments an apple isn't a nut tree [like a walnut, a chestnut etc.]
Nut trees are harder to transplant
because they are known for making a taproot, like a very long carrot, very early in its life.
That's just the way they grow. My chestnuts grew a taproot over one foot long it their
first month of growth before I planted them. Maybe because they are still young but the taproot is extremely fragile, and if you break it, your tree will not really ever be a good specimen
if it survives. I broke the root of 2 of my chestnuts upon transplanting but I thought: "Well, I've got the room, so why not?". I planted them in May. In mid August, they looked awful and in September, they had lost their leaves and died. In contrast, the other trees made great progress, some reaching 4 ft, in a particularly dry year. So I have about 28 chestnuts, [out of 30 nuts. Still small, but healthy.
So this question of taproot or no taproot depends on the type of tree it it, on the desire for a large of small tree, and on whether it's been held too long in a small pot. Beyond that, they need proper soil, exposure, fertilizing and watering, just like any other plant.