I’ve been obsessed with this species lately. It is one of the most interesting species I’ve ever studied.

All observations of the common witch-hazel (Hamamelis virginiana) in Vermont have been annotated (at least all observations that can be annotated). The results mostly agree with what’s in the literature but there are a couple of surprises. Check out the Plant Phenology chart on the taxon page (suitably restricted to Vermont). Briefly:

• Flower budding: [July–]August–October
• Flowering: September–November[–December]
• Resting: [December–]January–April
• Fruiting: May–October[–November]

Based on the number of iNat observations (a criterion that can be misleading), peak flower budding, peak flowering, and peak fruiting occur in September, October, and July, respectively. For more information:

• Annotating the common witch-hazel (googledoc)

Comments welcome.