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Corn seed germination. The easy answer to the question about a generally accepted germination time for your corn seeds is that yes there is a standard. While sweet corn can mature in as little as 70 days. Put the paper towel with seeds into a resealable plastic bag. Testing is conducted according to the association official seed analysts aosa international seed testing association ista rules for testing seeds or canada methods and procedures canada mp based on customer need. While a minimum temperature of approximately 50 degrees f is required for germination it is not advisable to base planting decisions on soil temperature alone. Corn seed goes through hypogeal germination which means the energy storage structures of the seed remain below ground when the seed germinates.
Plant sprouted seeds as directed in step 2 of section 1 above. Repeated wetting and drying cycles can decrease seed viability. Is there a standard germination time for corn. New varieties are sometimes in short supply and some poor quality seeds may be sold. However what if your corn seeds never come up. Usually it contains a blend of new seed and seeds up to many years old.
Check on the bag of corn seeds periodically during the following week to 10 days. If your hearts desire is to grow your own popcorn or make flavor packed cornmeal from your harvest germinating corn seeds is for you. Under ideal conditions most varieties of corn seeds will germinate within 7 10 days. If you have planted just a few blocks of corn that you plan on eating fresh from. Many factors come into play when it comes to corn seed germination and without germination you have no crop. Less than optimum absorption of water perhaps due to a rapidly drying seed zone may slow or stop germination.
When you plant corn in your garden it is easy to think ahead to harvest and imagine the tasty ears of corn you will be able to eat. Seal the bag and set it in a warm place between 65 and 75 degrees f away from direct sun. A key difference of the hypogeal germination associated with corn is the coleoptile a temporary sheath that protects the plumule as it pushes through to the soil surface see picture below. Corn kernels must absorb imbibe about 30 of their weight in water before germination begins. Add additional water to moisten the paper towel if it becomes dry. Soil temperature in the seed germination zone fluctuates considerably based on ambient air temperature and therefore is not a dependable indicator of when to plant.
Soak seeds in tepid water about an hour.
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