I use a small artist brush. Any small brush could work. You need to read the bloom and try dabbing at them to collect pollen as it sheds. So my approach is to move around the tree moving from variety to variety and collect pollen. While collecting you will pollinate at the same time. A flower is receptive when it is shedding. The pollen builds up on the brush to the point that it needs washing off every couple of days. An hour a day should show results if you can manage that much. I think they start maturing pollen as soon as it warms up some but I’ve tried early, mid, and late day.
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