Concord Seedless Grape
Plant Type: Dormant, bare-root
Soil Type: Loamy & Sandy Soils
Site Selection: Full Sun
Mature Height & Width: 5-6' Height and 8-10' Spread
Growth Rate: Fast - 12-24" or more per year once established
Moisture Requirements: Average
Concord Seedless Grape Vine
The Concord Grape is a multi-purpose seedless grape that is easy to grow. This vine will need a support system like a fence, trellis or garden structure to climb. Once established, this vine will produce a blue-black grape that is used for fresh eating, making grape juice and sweet wines, and jelly or jams. A quick and vigorous grower, this vine will produce nice green leaves and clusters of grapes. The birds will love these so plant enough to make everyone happy.
This vine will need a support system like a fence, trellis or garden structure to climb. Grapes in general need full sun and warmer temperatures to ripen, so choose your location wisely. Southern exposures are a great place to plant for the best yield. Winter protection in colder climates such as zones 4 and 5 is recommended.
This year 2022, we have another good crop, but the grapes are still green and very hard and and not one single one is purple.
What can/must I do to save this beautiful/delicious grape ?
Thank you in advance.
Over-cropping is the most common cause for home gardeners. An average grapevine may have 200 to 300 buds which are capable of producing fruit. If grapevines are not pruned properly in late winter, the number of fruit clusters may be excessive. The vine is unable to ripen the large crop properly, resulting in uneven ripening of the berries within the clusters. Since you mention you had them many years, possibly they will need some pruning on the vines and fertilizing.
Here is a web link to possibly help you out a bit more.