Saint Theresa Grape Vine

You don't say what zone you're in: I'm in zone 4. I'm only a year ahead of you with St. Theresa Grapes and I'm training them to a double wire fence. I will be unwinding the vines and laying them down and will cover them with straw for the winter. (Snow will come soon enough and provide about four feet of cover!!!) In the very early spring, I will reattach them to the wires and trim them back to 8 buds or so on each cane. If you have only a single trunk this year, next spring cut back to 3 buds each branch (assuming 2-3 branches). Don't try to keep too much foliage or vine as it will take away from fruit production. Good luck!

Spur pruning is the best option with this grape vine.

This grape goes dormant just like most other grapes. The leaves do seem a little more green but not abnormally so throughout the winter months. I mulch the base's well in the winter with straw and pick up the leftover straw and put on the garden in the spring. Very good compost.

In Denver, zone 5B, this year it was end of April. in 2017, it budded in early April, got frozen and re budded in May. I used heavier mulch this winter to keep it dormant longer.

I soak the roots in water for a couple hours and then plant. Plant as soon as possible after receipt.

YES!

1

Yes they are Kimberly. I live in Albuquerque and bought the smallest size two years ago. Now it is huge and full of grapes. Buy it.
Scott

I have had no problem with disease and I do not use any chemicals what so ever on mine. My chickens are my control. They are vigorous vine. This mostly seedless purple grape grows well on an arbor or screen. The slip-skin fruit has an excellent flavor. Tolerant of alkaline soil. Cold-hardy — stands up to temperatures as low as -30ºF. Ripens in early September. Self-pollinating

Grapes that are sour in late September may not be ripening evenly for a number of reasons, including: Weather: Cool and rainy conditions during pollination can disrupt pollination and lead to uneven ripening. Nutrient imbalances: A lack of nutrients like nitrogen, potassium, and boron can cause uneven ripening. Water stress: Water stress can cause uneven ripening, especially during critical growth stages. Cluster architecture: Dense grape clusters can create microclimates that lead to uneven ripening. Berries that are shaded by leaves or other clusters may not receive enough sunlight and airflow. Over-cropping: Too many grape clusters on the vine can cause uneven ripening. damage can cause uneven ripening. Grapes don't continue to ripen after they're picked, so they'll stay as sour or sweet as they were when they were harvested.