How to Properly Fertilize Grapes in July for a Bountiful Harvest

July is a crucial month for the development of grapevines, as this is when the berries actively form and swell. To ensure a rich and high-quality harvest, it is important to approach the fertilization of the plants correctly.

This is reported by AgroReview

Which Fertilizers to Choose for July Grape Fertilization

In July, the main focus is on potassium and phosphorus. These elements contribute to the full ripening of the berries, improving their taste, sugar content, and disease resistance. In contrast, nitrogen fertilizers should be significantly limited at this time, as they stimulate the growth of green mass at the expense of fruiting.

There are two main methods for fertilizing grapes:

• Root fertilization: fertilizers are dissolved in water and applied to the moist soil around the perimeter of the root zone or in special furrows or holes.
• Foliar fertilization: the leaves are sprayed with fertilizer solutions. This method allows for the quick delivery of nutrients to the plants. It is best to carry out the treatment in the evening or on cloudy days to avoid sunburn.

Mineral, Organic, and Homemade Fertilizers

For fertilizing grapes in July, it is advisable to use:

• Potassium salt or potassium sulfate: a source of potassium, used at a dosage of 15–20 g per 10 liters of water.
• Superphosphate: provides phosphorus to the grapes. Due to its poor solubility, it is recommended to apply it in advance or prepare an infusion by pouring hot water over it and letting it steep.
• Nitrogen-free complex fertilizers: choose specialized formulations for fruit crops or those labeled “autumn” with a higher content of potassium and phosphorus, such as potassium magnesium.

As additional means, you can use:

• Wood ash: contains potassium, phosphorus, and trace elements. It can be spread around the bush (1–2 cups) or prepared as an infusion (1 cup of ash in 10 liters of water, steeped for a day).
• Infusion of chicken manure (1:20) or cow dung (1:10): use very cautiously and only in cases of clear nitrogen deficiency, as the plant usually does not require this element in July. The dosage should be minimal or not used at all.

“Remember that the soil should be moist before fertilization, and after applying the fertilizers, it is advisable to water the grapes again to help the nutrients be better absorbed.”

By following these recommendations, grapevines will receive the necessary nutrients to form large and tasty berries in July.