Tissue: Permanent Crops

CropPlant Part to SampleTime of Sampling
BlueberriesLeaves – mid-shootApril thru September
CitrusMature leaves from non-fruiting
terminals (avoid recent flush)
July 15 to May 15
Deciduous Fruit/Nut Trees
(except those noted below)
Mature Leaves – from spursMay thru September
GrapesPetiole – opposite cluster
Petiole
Leaf blade – opposite cluster
Leaf blade – young mature
Bloom
Veraison
April & June
July thru Sept 15
Peaches & NectarinesLeaves – mid-shoot from current
season’s growth
April 15 thru Sept 15
PistachiosYoung, mature leaves from
non-fruiting terminals
May thru August
Walnuts & PecansTerminal leaflet of compound leaf