Q & A

Welcome to the Planet Natural Garden Forum! Whether you’re new to gardening or have been at it for some time, here you can search existing messages for answers to your questions or post a new message for others to reply to. If this is your first visit, please read over our forum instructions carefully before posting. Enjoy!


Eric Vinje

Hello Hope –

Beneficial Nematodes have a two month shelf life if refrigerated. However, they can live in the soil, at levels high enough to control pest insects, for around 18 months. Applications can be made anytime grubs and larvae are feeding on plant roots, and when soil temperatures are above 32˚F. Killing action begins 24 hours after application.

Nematodes can travel quite a bit vertically and should be able to survive the winter. Just make sure applications are made before the soil is frozen. Also, we stock Scanmask® year round and can ship them quickly to you, usually in 5-7 days.

Hope this helps!