Which trees are female trees, hence reducing the amount of pollen?
monoecious and dioecious are the keywords to look for"mono" have both male and female flowers on one tree "dio" have one type on a single treethe nursery you buy from should be able to give you information on the plants you buy, some research may be needed....Wikipedia gives explanationsthe best link for a list I can give you ishttp://www.saylorplants.com/SaylorPlant … ious2w.htmhope this helps
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