An Orchard From a Single Tree

| 3/26/2015 9:09:00 AM

Brian KallerAt some point in your childhood, I hope, you ate an apple and hit upon the idea of planting the seeds. Most such experiments stop at the paper-cup stage, but if your tree survived long enough to bear fruit, you probably noticed something strange: the seeds from that Golden Delicious apple do not necessarily grow into a Golden Delicious apple tree.

Seeds, you see, come from pollinated flowers. Flowers exist to get animals to combine a plant’s DNA with that of another plant, just as fruit exist to persuade animals to eat them and drop the seeds and fertiliser somewhere else. An apple’s fruit, obviously, is determined by what kind of apple tree it is, but the seeds inside are shaped by whatever pollen came to the flower.

My grafted apple trees.

My own grafted apple saplings.

If the bee that pollinated that Golden Delicious tree, way back when, had been to a crab-apple tree just before, then that Golden Delicious apple contains seeds that are part crab-apple. And since there are so many wild and domesticated apples around us, and bees need to make their appointed rounds, it’s quite difficult to grow purebred apples – and many other fruits – from seeds.

Even if you succeed in growing the fruit you want, it doesn’t necessarily come on the tree you want. You want a certain size of tree, suited for your climate and resistant to disease. With fruits you want a certain size, variety and flavour, and the two don’t often come in the same package.