We’re now entering the optimal window to collect leaf samples for Honeycrisp cultivars in Wisconsin and other regions with similar phenology. While leaf sampling for most apple cultivars is typically done in early to mid-August, Honeycrisp requires earlier sampling—and that time starts now, in late June to early July.

This shift in timing is based on observations and data collected over the last five years by researcher at Cornell University, showing that accurate nutrient analysis in Honeycrisp depends on collecting leaves before key physiological changes occur in the tree. There are two main reasons for this early timing:

• Honeycrisp trees tend to cease shoot growth by the third week in June, which is several weeks earlier than many other cultivars. Nutrient levels stabilize once growth slows, making this the best time to assess nutrient status.
• Zonal chlorosis often develops in Honeycrisp leaves by mid-July, which can distort nutrient concentrations—especially nitrogen—and lead to inaccurate test results. Sampling before chlorosis appears ensures cleaner, more reliable data.

Tips for Leaf Sampling Honeycrisp This Season:

• Begin collecting samples now and aim to complete sampling within the next 1–2 weeks.
• Avoid collecting leaves that already show signs of severe chlorosis, as these will not reflect true nutrient status.
• Follow standard sampling protocols: collect 50–100 healthy, mature leaves from the mid-shoot position on current season’s growth, avoiding spur leaves.

Early sampling allows you to adjust nutrition plans in time for midseason corrections or for planning next year’s fertility program. Reach out if you have questions about protocols or sample submission labs.

This article was posted in Apples and tagged Amaya Atucha, Apples, Honeycrisp, leaf sampling.