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30 Flower Seeds To Start Indoors (Late Winter & Spring)

Published on January 25, 2022 ♛ By Melissa J. Will

This post contains affiliate links.
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Once you try indoor seed starting, there’s no turning back. It’s very rewarding and a lot of fun. Along with vegetables, there are so many annual and perennial flowers to sow in your home to get a head start on the outdoor growing season.

If you are new to seed sowing, Seed Starting For Beginners walks through the entire process.

Assorted types of flower seeds to start indoors in winter.

Start Flower Seeds Indoors

Flower seeds to sow indoors in late winter and spring.

There are many good reasons to start seeds indoors in late winter and spring. The most practical reason is, by sowing indoors, we get a jump start on the growing season. All those months waiting for last frost can be used to get all sorts of plants established. This is essential for us cold climate gardeners.

Once the soil warms and the risk of frost has passed, our plants are ready for transplanting.

We can always purchase some plants from a nursery—and we all do—but sowing at home comes with the added bonus of options and lots of them.

There are countless types of flower seeds you can start indoors and I’ve provided a list of top picks to get you started.

If you are new to seed starting (indoors or outdoors), you might choose a reliable seed like a marigold to decorate a border.

Others may be up for a challenge and try sowing delphiniums or milkweed. These are both seeds that have a reputation for being difficult but once you know the tips (links below), you’re on your way.

It’s not just satisfying to raise trays (and trays!) of happy seedlings but the savings can be quite substantial. My own seed starting was the secret to transforming a big bare lawn to a flower haven within years.

For seed starting how-tos, my ebook, Seed Starting For Beginners shares everything. If you just need tips on supplies, this shows my low-budget seed starting setup.

Whatever you choose to grow, be sure to check that your choices are not invasive in your area. A good standard is to confirm that anything you grow will benefit local wildlife from insects to mammals. If it plays a positive role in the local eco-system, it gets a thumbs up from me.


Contents

I organize my indoor seed starting into three basic groups based on how long they need to get established.

Always check your seed packets to confirm the best timing for the varieties you have selected.

  • 30 Flower Seeds To Start Indoors
    • 10-12 Weeks Before Last Frost
    • 8-10 Weeks Before Last Frost
    • 4-8 Weeks Before Last Frost
  • Resources

30 Flower Seeds To Start Indoors

10-12 Weeks (70-84 Days) Before Last Frost

Examples of flowers seeds to sow indoors.

Perennial

Perennials are plants that live on for several years. They can flower or fruit year after year.

  • Bee Balm / Bergamot (Monarda spp.) | zones 2-9
  • Blanket Flower (Gaillardia spp.) | zones 3-10
  • Candytuft (Iberis sempervirens) | zones 3-9
  • Clematis (Clematis spp.) | zones 4-9
  • Columbine (Aquilegia spp.) | zones 2-9
  • Coneflower (Echinacea spp.) | zones 3-9
  • Lobelia | (Lobelia spp.) | zones 4-8 (there are both perennial and annual species)
  • Milkweed (Asclepias spp.) | zones 3-9
  • Penstemon (Penstemon spp.) | zones 3-8
  • Primrose (Primula spp.) hybrid | zones 5-7
  • Verbena (Verbena spp.) | zones 4-8

Annual

Annuals are plants that flower or fruit in the first year, including many flowers, herbs, and vegetables. Sunflowers are a good example of annuals. Annuals can be short-lived and just last for one growing season (spring and summer).

  • Bells of Ireland (Moluccella laevis)
  • Heliotropes (Heliotropium spp.)

This is also time to start woody herbs from seed including oregano, rosemary, thyme, and sage although growing from cuttings is much faster.

Also see Annuals Versus Perennials: What’s The Difference?

Mail Order Seeds

  • SeedsNow | Botanical Interests US Shops (US Shipping)
  • High Mowing US Shop (US & CAD Shipping)
  • West Coast Seeds Canadian Shop (US & CAD Shipping)

8-10 Weeks (56-70 Days) Before Last Frost

Examples of flowers to sow indoors eight weeks before last frost.

Perennial

  • Black-eyed Susan (Rudbeckia spp.) | zones 3-9
  • Blazing Star (Liatris spp.) | zones 4-8
  • Delphinium (Delphinium spp.) | zones 3-8
  • Geranium (Geranium spp.) | zones 4-9
  • Shasta Daisy (Leucanthemum x superbum) | zones 4-9

Annual

  • Iceland Poppy (Papaver spp.) – hardy short-lived perennial
  • Marigold (Tagetes spp.)
  • Snapdragon (Antirrhinum majus) – biennial zones 8-11
  • Titan Sunflowers (annual) | Any really slow-growing sunflowers may need to be started indoors. The rest do best with direct sowing outdoors.

4-8 Weeks (28-56 Days) Before Last Frost

Flowers to sow indoors four weeks before last frost.

Perennial

  • Globe Thistle (Echinops ritro) | zones 3-9
  • Lavender, English | zones 5-9 | Propagation by cuttings is best

Annual

  • Black-eyed Susan Vine (Thungergia spp.)
  • Calendula (Calendula spp.)
  • Honeywort / Cerinthe (Cerinthe major purpuranscens)
  • Nasturtium (Nasturtium spp.)
  • Sweet Pea (Lathyrus genus)
  • Zinnia (Zinnia spp.)

Resources

Find Your Frost Dates & Hardiness Zone

  • Plant Hardiness Zones | United States flag United States | Canadian flag Canada
    These are listed on seed packets and plant tags to guide your choices.
  • Average Frost Dates | Use this calculator at Almanac.com. Enter your city and state or province to find your first and last frost dates and number of frost-free days.
  • Tips: Understanding Frosts & Freezing For Gardeners
Seed Starting For Beginners ebook cover.

Seed Starting for Beginners
Sow Inside Grow Outside

by Melissa J. Will

NEW EDITION | Everything you need to get started with indoor seed starting for indoor and outdoor plants. Grow what you want—any time of year!

About This Ebook | Visit Ebook Shop

This ebook is a digital file (PDF format) you save to your device. It is not a physical product.

Buy Now
$8 US

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Seed Sowing Plans

Indoors

  • My Indoor Seed Sowing Plan | Week by week
  • 30 Flower Seeds To Start Indoors | Late Winter & Spring

Outdoors

  • How to Grow Your First Vegetable Garden (Right Now)
  • Tips For Direct Sowing Seeds Before Last Frost
  • 20 Fast-Growing Vegetables | Spring or Fall
  • Vegetable Succession Planting Ideas
  • Flowers To Sow Mid-Summer
  • Vegetables To Start Mid-Summer
  • Flower Seeds To Sow In Fall
  • Winter Seed Sowing

~Melissa the Empress of Dirt ♛

Flower seeds to sow indoors in late winter and spring.
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