Grape Bud Analysis

Since 1983, Bio Ag Services has provided bud analysis for growers like you throughout California and North America.

Knowing the number, size, and location of future bunches on your spurs and canes will help you make pruning decisions that maximize your yield and minimize your thinning costs.

If your vineyard has low fruitfulness, clues within the buds can help diagnose a problem such as early or mid-season carbohydrate balance, or perhaps bud mite damage.

Bio Ag is California’s leading bud analysis service for a good reason. We provide more information than anyone else.

We Do This

Count bunches per bud.

So You Can

  • Adjust pruning decisions.

  • Reduce thinning costs.

  • Leave extra spurs or canes.

Diagnose fruitfulness problems.

  • Consider carbohydrates.

  • Consider nutrition.

  • Be aware of pathogens or stress.

  • Assess frost damage.

  • Control bud mites.

In grape bud analysis, our inspectors dissect buds under a microscope to count the tiny bunch primordia that will become next year’s crop. 

When we find high fruitfulness, our growers can safely minimize the number of spurs or canes they leave on the vines after pruning. This reduces thinning costs in the spring.

When we find unusually low fruitfulness, our growers are forewarned to modify their pruning to add more bunches by leaving more or longer spurs and canes.

When vineyards suffer from low production, our analysis of unfruitful buds provides clues about the causes, which may stem from failed inflorescence, bud necrosis, some kind of stress, bud mites, or disease.

In vineyards infested with bud mites, we count the percent of buds infested and the level of damage to the bunch primordia.

To arrange for bud analysis, or find out more information, contact our Bud Analysis Manager:

Rob Weaver
cell: 559-977-2563