Increasing grape berry set and weight

Nitrogen and phosphorus are significant in increasing wine grape berry set and weight.


Trials show that applications of nitrogen at flowering increases wine grape berry set. High rates of N will increase wine grape yield. In work by Nielsen et al, N yield responses hadn`t peaked at applications of 300kg/ha and there was a similar correlation with grape bunch weight in two out of three years of this trials.


Most of the phosphorus comes from soil reserves as grapes are good at extracting phosphorus from the soil. Phosphorus is also very mobile in the vine. Where phosphorus is naturally low in soils, applied fertilizer phosphate increases wine grape berry set and crop yield.

Recommended Yara fertilisers for grapevines

Grapevine fertigation and nutrition advice
Grapevine fertigation and nutrition advice

Looking for even more information ...

If you would like more information and would like to speak to one of our fruit specialists or area managers please find all their contact details here

Contact your local Yara area manager or agronomist



Where can I buy Yara fertiliser ...

If you would like to find your nearest Yara supplier or merchant simply use this searchable map with all their contact details here.

Where can I buy Yara fertilisers >