Wild Seed Project tree background image
Wild Seed Project: Returning native plants to the Maine landscape
by Heather McCargo • November 9, 2016

6 easy steps for autumn and winter planting

Fall and winter are the best times to sow native seeds. In Maine, the yearly cycle for seed ripening and germination is different from common garden and vegetable seeds. Many native seeds need to have a winter period of cold moist temperatures to break dormancy and germinate. Not all native seeds require this cold period for germination, but every seed can be sown outdoors in the fall or winter. Below are the six easy steps to do it.

Wild Seed Project native seed packets and seed pods

 

Step 1 – The ingredients

Gather the items you’ll need onto a worktable or cleared area.

  • Seeds:
    • Wild Seed Project seeds
    • Your own seeds
  • Plastic pots 4 to 6 inches in diameter
  • Plastic labels for each species you will sow
  • Pencil (not pen, even waterproof pens wash off within several months)
  • Organic compost-based potting soil
  • Sand: coarse all purpose sand from a hardware store (no chemicals)
  • Watering can with rain nozzle
  • Rodent screen ¼ to ½ inch holes big enough to protect the pots

Native seed planting equipment

 

Step 2 – Prepare the pots

Fill the pots and pack the soil to create a flat surface ¼ or ½ inch from the top.

Label the pot with the name and sowing date and press label down deep along the edge of the pot.

Soil filled pot ready for planting

 

Step 3 – Sow the seeds

Seeds can be sown thickly (1/8 to 1/4 inch apart). Spread them evenly throughout the pot on the surface of the soil.

Three types of seeds in pots

 

Cover the seeds with the sand by sprinkling it around, much as you would add salt to a dish. A general rule of thumb for covering the seeds is to cover to the depth of the thickness of the seed. Example: a sesame seed is covered with 1/8th of an inch of sand; a pea is covered with ½ inch of sand.

Three pots planted with soil, seeds and sand

 

Water the pots gently but thoroughly – do not flood them as the seeds may float to the surface or wash out of the pot.

 

Step 4 – Place pots in shady location out of doors

Carry pots outside and cover with rodent wire. Make sure the pots are level. Under a garden bench or table, or on the north side of the house beyond the roof drip line works well. A cold frame with a wire covering (not plastic or glass) is another good choice.

Pots outside in coldframe Pots outside, under screen

 

Step 5 – Waiting for germination and seedling care

Rain, snow, sleet, a January thaw, and then an ice storm followed by more snow; the seeds will be fine.

Seed pots under snow

 

Start checking the pots in late-March for germination. Each native seed has its own timetable for germination beginning with the cold and frosty temperatures of early spring and sometimes not until the heat of summer. By late-April you will need to begin watering every couple of days, depending upon the weather. Be patient and observant. The seeds know what to do.

Germinated Seeds

 

In May or June some species can be moved to bigger pots while other species will be growing very slowly or may just have germinated. These can stay in the same pots. Sun loving species should be moved to a partially sunny location to grow. Keep watered.

 

Step 6 – Planting into your garden

Seedlings can grow all summer in your little nursery area and then be planted into the garden in September. This is the easiest way to get to know your new plants and to not forget to water them. If you choose to plant them into the garden over the summer, just be sure to check on them regularly for watering and to make sure nearby plants are not crowding them. Most natives are perennials and do not bloom in the first summer, but many will bloom in the second summer. Shrubs and slow-growing woodland wildflowers may take longer.

Three stages of swamp milkweed

 

Thank you for sowing native seeds and for joining the growing number of people helping to increase native plants in Maine. 

Read more about germinating native seeds in How to Grow Natives From Seed.