Annual Flower Seeds to Plant in Fall
What Fall Sowing Means for Your Flower Garden
Sweet peas, calendula, cornflowers, California poppies, and annual coreopsis are flower seeds to consider for fall sowing. The right choices depend on your winter weather and whether the seeds will grow into young plants before winter or wait in the soil for a later growing season.
In mild-winter gardens, suitable cool-season annuals can establish during autumn and flower in winter or spring, depending on the variety. Where winters are severe, those same seedlings may not survive outdoors. Dormant sowing is a different approach: seeds suitable for that method are planted after conditions become cold enough to discourage germination until later. Use species-specific local guidance rather than assuming every annual can overwinter.
Fall sowing does not automatically mean flowers this fall. If you want an autumn display, see The 10 Best Flowers for Fall for plants to grow earlier or add as established plants.
Choose Your Sowing Time
Check your seed packet, local frost information, and regional growing advice together. A USDA hardiness zone describes winter cold; it does not supply an exact sowing date or guarantee that young annuals will survive. For the wider seasonal plan, visit our cool-season planting guide.
Sweet Peas
Sweet peas (Lathyrus odoratus) grow best in cool conditions. In mild-winter areas, sow in fall so plants can establish before winter and flower in the following cool growing season. In colder areas, follow a locally recommended protected-starting or spring-sowing schedule rather than relying on a nationwide September-through-November window.
Choose a sunny site with well-drained soil. Sow at the depth specified for your variety, keep the seedbed moist during germination, and provide a trellis for climbing types while plants are young. Once flowering begins, cut blooms or remove faded flowers regularly to reduce seedpod formation and encourage continued flowering.
Cornflowers (Bachelor's Buttons)
Cornflowers (Centaurea cyanus) are hardy annuals that can be sown in autumn where young plants can survive the winter. Fall-established plants can flower earlier than spring-sown plants, but hard freezes may require protection; in severe-winter areas, follow local guidance for an alternative sowing season.
Direct sow in a sunny, well-drained bed, following the packet's depth and spacing. Sow thinly, water gently, and thin crowded seedlings so the plants have room to branch. Remove spent flowers to keep the planting tidy and limit unwanted reseeding.
Pot Marigold (Calendula)
Calendula (Calendula officinalis), also called pot marigold, is a cool-season flower. In mild-winter gardens, a fall sowing can provide flowers during the cooler months. Whether blooms begin in autumn, winter, or spring depends on the sowing date, variety, and local temperatures; a quick fall crop is not guaranteed.
Sow about 1/4 inch deep, unless your packet specifies otherwise, in a sunny, well-drained bed or container. Keep the soil moist until seedlings establish, then thin to the recommended spacing. Remove faded flowers to encourage more blooms. Calendula is a different plant from the frost-sensitive French and African marigolds often grown through summer.
Planning Beyond Annuals: Foxgloves
Common foxglove (Digitalis purpurea) is usually a biennial or short-lived perennial. Many plants develop leaves before flowering in a later season, although some varieties are bred for first-year flowers. Follow the variety's sowing and overwintering directions; do not expect every fall sowing to flower the same spring. Foxgloves are poisonous if eaten.
California Poppy
California poppies (Eschscholzia californica) are often grown as annuals and suit sunny, well-drained sites. Fall sowing can give them a head start in regions with suitable winter conditions; very early spring sowing is another option. Use regional guidance to choose between them rather than treating the first freeze as a universal signal.
Direct sow where the plants will grow, following the packet's shallow sowing directions. Water gently to maintain seed-to-soil contact and moisture during establishment, then thin seedlings to the variety's recommended spacing. Avoid moving established seedlings unnecessarily: their taproots make direct sowing the simpler approach. Expect flowers in the following growing season rather than immediately after fall sowing.
Coreopsis tinctoria
Annual coreopsis (Coreopsis tinctoria), also called plains coreopsis, produces yellow flowers often marked with red near the center. Fall sowing is used in suitable regions, including parts of its native range. Check local recommendations before planting; this is not a single sowing schedule for every climate or every coreopsis species.
Choose a sunny site, remove weeds, and press the tiny seeds onto a prepared soil surface. They need light to germinate, so avoid burying them beneath a thick layer of soil or mulch. Water gently during establishment and thin crowded seedlings according to the packet. Leave some flower heads to ripen if you want plants to reseed. Perennial coreopsis varieties may have different sowing and flowering requirements.
Help Your Fall-Sown Seeds Get Established
Prepare a weed-free seedbed and follow each packet's depth and spacing directions. Label the rows or patches so you can distinguish flower seedlings from weeds. For seeds intended to germinate in fall, keep the seedbed evenly moist without waterlogging it. Once seedlings emerge, thin them before they become crowded.
Fall sowing and cold stratification are not the same thing. Some seeds need cold, moist conditions to overcome dormancy; others germinate without that treatment. Check the specific seed's requirements before chilling it. Our guide to how to cold stratify seeds explains the method when it is needed.
Choose seeds that suit your local conditions and the season when you want flowers. A well-timed fall sowing can make the next growing season's garden easier to get started.