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Sampling GuideSampling Guide
Sampling Techniques for Soil and Plant Tissue
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Analytical Catalog
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Tissue: Permanent Crops

Crop Plant Part to Sample Time of Sampling
Blueberries Leaves – mid-shoot April thru September
Citrus Mature leaves from non-fruiting
terminals (avoid recent flush)
July 15 to May 15
Deciduous Fruit/Nut Trees
(except those noted below)
Mature Leaves – from spurs May thru September
Grapes Petiole - opposite cluster
Petiole
Leaf blade – opposite cluster
Leaf blade – young mature
Bloom
Veraison
April & June
July thru Sept 15
Peaches & Nectarines Leaves – mid-shoot from current
season’s growth
April 15 thru Sept 15
Pistachios Young, mature leaves from
non-fruiting terminals
May thru August
Walnuts & Pecans Terminal leaflet of compound leaf Terminal leaflet of compound leaf