Also, some seed companies are no longer selling seeds to customers:

Territorial Seed Company:
Attention Customers: Due to extremely high demand we are unable to accept new orders for a limited time to ensure current orders can be filled and shipped as quickly and safely as possible. If you have already submitted an order, don't worry! We are putting all our resources towards meeting our commitments of getting your order processed.

Please check our website for updates and click the link below to sign up to be notified when we start taking orders again.

Thank you for your understanding in these difficult times but know our dedicated staff is working diligently every day because they understand your personal food security is essential now more than ever.
[link to territorialseed.com (secure)]

Johnny Seeds:
At this time, we are accepting new orders only from commercial farmers shipping to the U.S. and Canada.
[link to www.johnnyseeds.com (secure)]

Seed Savers Exchange:
We are temporarily not accepting new orders.
Due to a sharp increase in seed orders, we are not accepting new orders at this time. We are still shipping previously placed orders and will open ordering back up again once we catch up.

Burpee:
[link to www.burpee.com (secure)]