The figure you obtain using this formula will give you the approximate height of the tree in inches. There is also a genetic factor built in, so some cultivars are more susceptible to bolting than others. For example, the cultivars America, Long Standing Bloomsdale, Winter Bloomsdale, bounty, Melody, Olympia, Packer, Tyee Hybrid, and Viking all resist bolting. It does poorly in temperatures above 77 F. Plant spinach as early in the spring as you can get into the ground and hope you have at least 40 days before the onset of hot weather. Last year my corn produced little tassels in the ear and little ears in the tassels.
Corn is a monoecious plant with imperfect flowers.
Both sexes appear on the same plant but in different flowers. The tassels bear the male flowers, and the ears and silk are the female flowers. Any climatic stress, such as long, cool periods following early periods of warm weather, can produce these sexual abnormalities in the corn plant. Most of the corn plants should be normal however. Because this is a climatic problem there's not much you can do about it, so don't waste time worrying.