Gray Dogwood seeds ripen from early August through early September. Collect the berries when they are creamy white and without black blemishes. The fruit should have juicy sticky pulp surrounding a brownish green seed. Collect and spread out in thin layers. Store in a cool dark area for a day or two, then remove pulp and wash the seeds.
Air dry away from sunlight and sow as soon as possible.
Bur Oak acorns ripen in summer and drop from late August into September. They germinate almost immediately and grow best if planted right away in bare soil in open areas. Wild Bergamot seeds ripen from July to September. When the plant is brown to gray, clip off the seed heads and store in thin layers to dry. Do not let these get packed together and moldy.