We have grape vines in our backyard with grapes growing i am just wondering When are ready on the vine?

1. Color: The color of the grape is a good indicator of ripeness. Most varieties turn from green to a deeper, richer hue as they ripen. Dark-colored grapes, such as Concord or Cabernet Sauvignon, should be deep purple or almost black when fully ripe. White or green grapes, like Thompson Seedless or Chardonnay, should be golden yellow or pale green when ripe.

2. Softness: Ripe grapes are soft and slightly yielding when you gently press them with your finger. They should not be hard or firm to the touch. However, avoid grapes that are too soft or mushy, as they may be overripe.

3. Sweetness: Taste a grape to determine its sweetness level. Ripe grapes should have a balanced and pronounced sweetness, with a pleasant sugar-to-acidity ratio. Sour or excessively tart grapes are not fully ripe.

4. Skin: The skin of a ripe grape should be thin and delicate, not too thick or tough. It should also be free from any major cracks, blemishes, or wrinkles.

5. Stem: The stem of a grape should be brown and slightly woody, indicating maturity. Green stems suggest the grape is still developing.

Harvesting Timeframe:

The exact time when grapes are ready to harvest depends on the grape variety, climate, and growing conditions. However, you can generally expect grapes to be ready for harvest:

- Early summer to early fall: for early-ripening varieties such as Thompson Seedless or Himrod.

- Late summer to early fall: for mid-season varieties like Concord or Merlot.

- Early fall to late fall: for late-ripening varieties like Cabernet Sauvignon or Tannat.

Additional Factors:

Consider other factors that can influence grape ripeness:

- Location: Grapes grown in warmer climates tend to ripen earlier compared to those in cooler regions.

- Sunlight: Grapes require adequate sunlight exposure for optimal ripening. If your vines receive limited sun, the grapes may take longer to mature.

- Water: Provide consistent watering during the growing season, especially during hot and dry periods. Water stress can affect grape development and flavor.

If you're unsure whether your grapes are fully ripe, it's best to wait a few more days to ensure optimum flavor and quality.