Below is a link to my pecan pollination chart. This chart can easily be adjusted to your area by matching pollen shed of a reference cultivar such as Stuart. In this chart, Stuart sheds first pollen in column V. Trees shed pollen at different times just about every year depending on the weather. Do NOT take this chart to be completely accurate. I still have a lot of work to do adding and verifying data. Source information was gleaned from these sources:
Alabama website: http://www.alabamapecangrowers.com/PDF/PollenChart2014.pdf
and from Wes Rice’s book Pecans Volume II (Thanks Wes!)
You will need Excel 2013 or later to use the macros. Macros must be enabled for the features to work properly. Search for “enable excel macros” to find out how to turn them on. Open the file in Excel, then spend a few minutes getting familiar with the structure.
Row 1 contains date independent start times for pistillate receptivity and pollen shed as used by Patrick Conner at UGA.
Row 2 contains dates starting with April 15th as used by the Alabama pollination chart.
Row 3 contains the count of varieties that shed pollen on that particular date.
Row 4 contains the count of varieties that have receptive pistillate flowers on that date.
Rows 5 to 220 contain variety details to the extent I have filled them in.
Here is the fun part. Find two varieties you want to compare to see if they are good pollination partners. Put an X in column A beside the two varieties. A macro will make all rows between the selections invisible so that the chosen varieties are adjacent. Highlight the rows and you can easily focus on the degree to which they match. It is important with pecan to have some varieties that are protandrous and some that are protogynous. This is because pollen must be shed at the same time pistillate flowers are receptive. Want to compare 3 or more varieties? Just put an X in column A for each variety you want to compare. When finished, click on the black cells and backspace then hit enter. The rows will be expanded again.
As an example, find a good pollination partner for Forkert. Since Forkert is type 2 (protogynous), the optimum pollinator would be a type 1. We could compare Desirable with Forkert and would find that they are not really good pollination partners. We could then compare Forkert with Tanner and guess what, we just found a decent pollination partner. This is significant because Forkert is notoriously difficult to pollinate because it blooms so late compared to other varieties.
Here is the link to the chart: