I buy all my seed from mountain valley seed. Bulk is better. Anything less than 5lbs is throwing money away. So drop that dough and just store them. I use 3 oz of seed per tray five or take.

That means I can get about 25 trays of sunflower for a 5 lb bag. Meaning each tray costs about $1.60 per tray on seed and it’ll store for months with 5lbs being $41

https://www.amazon.com/dp/B010WDD8YE/ref=cm_sw_r_cp_api_i_5l.hEbHV4AGAP