Petiole testing

What is your vine nutrients status?

Petiole testing can provide a snapshot of the nutrient status of the vine. Obtaining quantitative information on nutrient levels can assist in determining the effectiveness of fertiliser applications and also help identify the cause of any specific vine problems.

The following table outlines nutrient guidelines for the full list of parameters tested in our Petiole Analysis Suite. For more information follow the links below.
PETIOLE FACT SHEET
PETIOLE SAMPLING GUIDE
PETIOLE TECHNICAL ARTICLE
PETIOLE LABELS
Nutrient status of the vine
Winechek
Nutrient Deficient Marginal Adequate High Toxic
Nitrogen (%) 0.80-1.10
Nitrate Nitrogen (mg/kg) <340 340-499 500-1200 >1200
Phosphorus (%) <0.15 0.15-0.24 0.25-0.50 >0.50
Potassium (%) <1.0 1.0-1.7 1.8-3.0
Calcium (%) 1.2-2.5
Magnesium (%) <0.30 0.30-0.39 >0.40
Sodium (%) 0.10-0.30 0.40-0.50 >0.50
Chloride (%) <1.0 1.0-1.5 >1.0 or 1.5
Iron (mg/kg) 7 70
Zinc (mg/kg) <15 15-26 >26
Manganese (mg/kg) <20 20-29 30-60 >500
Boron (mg/kg) <25 26-30 30-100 >100
Copper (mg/kg) <3 3.6 >6
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