How to Fertilize Thompson Grape Vines

The three main nutrients Thompson Grape Vines need to grow are nitrogen, zinc and potassium. Fertilizing your grapevines will add these nutrients to the soil while helping them grow strong and yield grapes year after year. Thompson seedless grapes are very susceptible to powdery mildew, a fungus disease that can damage and destroy vines. Fertilizing also helps prevent powdery mildew and other diseases.

Things You'll Need

• 10-10-10 fertilizer
• Water
• Gloves
• Bag
• Nitrogen fertilizer

Instructions

1. Remove all damaged and dead wood in late winter/early spring. Place the dead and damaged wood in a bag.

2. Fertilize your Thompson Grape Vines once in the early spring before new growth begins. Spread a 10-10-10 ratio fertilizer around the vine, 6 to 8 inches from the base of the plant.

3. Water grapevines after fertilization so the fertilizer can penetrate the soil and reach the roots of the vines.

4. Fertilize again in the fall with a nitrogen-based fertilizer after harvest.

5. Break the soil up around your Thompson vines to keep the ground from freezing.

6. Water the area around vines thoroughly to make sure the fertilizer can reach the roots.

References

• Table Grapes
• Best Practice of Nitrogen Fertilizers on Grapes