Grow varieties of maize, extend the growing season and culinary options. Can take place for pollination, the male part of the corn plant, potted the tassel, pollen at the same time the female part of the plant, the silk forms. As wind spreads pollen cross-pollination between varieties occurs when more than one variety is in the same pollination stage at a time. Cross-pollination is generally undesirable because it often sinks into sweet corn and increased starchiness.
Corn planted fertilize not closely together, if more than one variety developed tassels at the same time. To reduce cross-pollination, stagger planting times or select varieties with different maturation dates. Allow 14 days between tass ling times. Plant early, mid and late season corn varieties to extend the growing season without pollination. Early varieties are Earlivee and Seneca Horizon, Miracle and Bon Appetit are mid-season varieties, the late season varieties Golden Cross Bantam and Lochief. Bi-color corn is a deliberate cross-pollination between yellow and white maize.
When planting corn varieties with similar tassel times, allow at least 250 meters between varieties in order to reduce cross-pollination. Less cross-pollination occurs when corn is not planted in the path of the prevailing winds. Although not necessary, gardeners, eliminated with a distance of 700 feet between the varieties completely any chance of cross-pollination.
Row covers – lightweight fabric designed to sunlight and water and provides protection permit for the plant against insects and inclement weather – to reduce cross-pollination between maize varieties. This method requires manual pollination by the gardener, however. To pollinate maize manually pollen grains from the tassel must come into contact with the floss at the nodes. Cut a puff and wave it like a magic wand to make pollen landing on the silk. Cover the silk to ensure fully adequate pollination. Other barrier methods include the three victims rows of corn growing on the border of each corn plot to catch most of the pollen between plots.
Environmental factors (including heat and drought) affect corn pollination. When temperatures exceed 95 degrees Fahrenheit and humidity is low, the quality of the pollen is decreasing and less silk available to accept the pollen. High temperatures combined to reduce the number of days with dry corn plants pollinate eight to about two. Low soil fertility may slow early in the development of the maize plant corn development and cause the plants pollinate later than expected.