How about a raffle for acorns? Acorns used to buy tickets for a big acorn award.
Or a great gardening tool --- nice quality.
Gift certificates are always nice. They could be to places that sell plants online or seeds online.
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others. ~~ Sharon Brown