There are better suppliers now on nematodes. And some will work better a cooler temps so fall is an option for treatment too. If you fish with worms, you now how they smell when they go bad. Same for nematodes. Take a whiff. They should smell like a good friable soil. Keep them in the crisper in the original container in a gallon freezer zip lot. In with the celery and carrot etc. They will last a year easy.
