I've been growing pumpkins for several years and have always had very good results. This year has been odd - late blossoming, and then almost exclusively male blossom. Where I have always gotten multiple pumpkins per plant, this year some plants absolutely nothing. Lots of leaf, good colour, no wilt or fungus - all looking incredibly healthy. Pollinators were late arriving this year, but have had lots of them for the past 6-7 weeks (especially hoover flies and bees) but so few female blossom across all breeds (12) of pumpkins.