For your information I am watering one hour a day, everyday via drip system. Concord grapes are easily squeezed from their skins, known as slip-skin, says the Concord Grape Association. The most obvious answer would be that cuttings or shoots from this grape vine, where planted in several different locations in this area. Seedless varieties of grapes are a genetic mutation that occurred years ago, using a chemical process which caused grapes to be produced without seeds inside. Mulch in spring when the soil is moist, to suppress weeds, placing stones or gravel, 5-7.5cm (2-3in) deep around the base of … Seedless watermelons are particularly interesting because they must be propagated by seed, and yet growers can still exploit parthenocarpy. I often receive questions about growing seedless grapes. Allow full cropping thereafter. In the past, most of the seedless varieties wasn’t cold hardy enough to withstand harsh winters conditions, but with excellent breeding programs and allot of scientific experimentation, new seedless varieties where specially bred for these condition. This is one reason why most vines don't produce grapes … Often, seedless grapes have tiny, unusable seeds. Do you have any idea what the problem may be? With this article, I will try to clear up some of the mysteries of growing seedless grapes. Some seedless grape varieties may develop tiny seeds/vestigial seeds or seed remnants/traces depending on the variety and the climate in which they are grown. As this zygote gradually develops into a seed, the ovary ripens and matures and its walls either turn fleshy (berries or drupes) or transform into a hard shell (nuts). Some seedless grape varieties have been grown this way since Roman times (a grape plant that is 2,000 years old). Allot of research, and off course money, was spend on finding ways to grow better quality grapes without loosing the natural characteristics and taste of the grapes. This is true of grapes, blueberries, apples, cherries, etc.