While this guide is meticulously tracked from our homestead here in Molalla, Oregon, the beauty of phenology is that nature speaks the same language everywhere. Whether you are down the road or in another state, you can use these exact same biological milestones. When a specific indicator plant blooms in your neighborhood, it signals that the soil temperature and climate conditions are perfectly primed for the corresponding garden task.
Why we transitioned to phenology: You might remember that I used to break this information down using moon-phase gardening. However, wanting a more grounded, observable approach, I switched to tracking seasons through indicator plants blooming or fruiting—blending modern observation with timeless phenological folklore that remains highly relevant today.
Explore the science: Learn more about how this system works by reading our full article:
How to use this guide: Keep in mind that calendar dates will always shift. You’ll need to observe Mother Nature closely to catch the perfect window! If you start seeds indoors early, always calculate your transplant dates carefully so your starts don’t become root-bound in their pots.
Mid-Late February (happened Feb 19, 2026)
Osoberry (Indian Plum) begins to bloom. First shrub to bloom after winter.
| Start Seed Indoors: Cabbage, Broccoli, Kale, Cauliflower, Onions, Leeks, Chives, Oregano, Thyme, Sage, Pansy, Viola, Echinacea, Rudbeckia, Delphinium (Requires 2 weeks of cold stratification before sowing) | Plant Bare-Root: Ornamental trees/shrubs, Fruit Trees, Cane Berries, Strawberries (Pinch off all flowers during the first summer to force the plant to build massive roots instead of early berries.) Keep roots soaking in a bucket of water until the exact second they go into the ground, but no more than 12-24 hours. | Transplant: Primrose |
Early-Mid March (happened March 8, 2026)
Forsythia begins to bloom.
| Start Seed Outdoors: Poppies, Sweet Peas, Larkspur*, Bachelor’s Buttons, Chervil, Endive, Escarole, Leek, Cilantro, Parsley, Parsnip, Radish, Salsify, Lettuce, Peas, Spinach, Onion (sets, seed)** *Refrigerate Larkspur seeds for 2 weeks before sowing outdoor. **For bigger onions, plant from seed not sets. | Plant Bare-Root: Rhubarb (crowns)***, Asparagus (crowns)**** ***Rhubarb don’t harvest first year. ****Asparagus don’t harvest for 2 years. |
Early-Mid March about a week after Forsythia starts to bloom typically (happened March 8, 2026)
When Flowering Quince, Grape Hyacinth, and Narcissus are in full bloom. Lilac are just starting to leaf.
| Start Seed Indoors: Tomatoes, Tomatillos, Peppers, Eggplant | Plant Bare-Root: Hostas, Bleeding Hearts, Astilbe |
| Start Seed Outdoors: Alyssum, Calendula, Borage (see below for companion planting with tomatoes), Dill, Swiss Chard, Turnip, Carrots, Kohlrabi, Collard Greens, Broad Bean, Corn Salad, Fennel (Bulb), Potatoes (seed) | Transplant: Snapdragons, Foxglove, & Canterbury Bells, Pansy, Viola, Echinacea, Rudbeckia, Delphinium, Rosemary, Mint, Thyme, Sage, Chives, Onions, Leeks, Cauliflower, Cabbage, Broccoli, Kale, Celery, Celeriac, Peas, Strawberry seedlings*, Rhubarb seedlings **. *Strawberries pinch off all flowers during the first summer to force the plant to build massive roots instead of early berries. **Rhubarb don’t harvest first 2 years when grown this way. Gently harden off seedlings for a few days before planting so they aren’t shocked by the outdoor air. |
Late April, Early May (happened April 11, 2026 – early)
When Flowering Crabapples and Lilacs are in full bloom.
| Start Seed Indoors: All Melons and Squash incl. Cucumbers, Pumpkins, Zucchini, Watermelon, etc. Start Seed Indoors in biodegradable or large pots (you do not wish to disturb roots when transplanting). | Transplant: Fuchsia, Asparagus seedlings Protect Fuchsia from frost. Asparagus don’t harvest for 3 years when grown this way. | Harvest begins: Spinach, Lettuce, Endive, Escarole, Chervil, Cilantro, Parsely, Corn Salad, Radishes (Check them the moment you see the leafy green tops reach about 6 inches tall) |
| Start Seed Outdoors: Cosmos, Zinnias, Amaranth, Celosia, Sunflowers, Marigolds, Nasturtium, New Zealand Spinach | Plant Bulbs: Dahlias, Gladiolus, & Canna Lilies |
Early-Mid May about 2 weeks after full bloom (happened Late April 2026 – early)
Lilac blooms begin to fade and Apple blossoms fall.
| Start Seed Outdoors: Soybean, Bush Lima Bean, Squash, Melons, Cucumbers, Bush/Pole Beans, Corn | Harvest begins: Dill leaves |
Mid-Late May (happened May 10, 2026 – early)
When Irises, Peonies and Black Locust in full bloom.
| Start Seed Outdoors: Borage (if companion planting with Tomatoes) | Transplant: Geraniums, Petunias, Marigolds, Nasturtiums, Basil, Eggplant, Peppers, Tomatillo, Tomatoes, Melons, Squash, Sweet Potato, Okra, Pole Lima Beans Watch weather and protect from cold temps | Harvest begins: Dill flowers, Kohlrabi |
Late May through June
When Mock Orange, Ninebark and Beautybush is in full bloom.
| Start Seed Indoors for Fall Harvest: Kale, Broccoli, Cauliflower, Brussels Sprouts | Start Seed Outdoors for Fall Harvest: Carrots, Parsnips, Fennel (bulb), Rutabaga, Swiss Chard, Collard Greens, Cabbage Use floating row covers immediately over outdoor brassica seeds to block pests. | Harvest begins: Apricots, Honeyberries, Strawberries, Salmonberries, Thimbleberries, Hardneck Garlic scapes, Peas, Swiss Chard through summer, Collard Greens through summer, Cabbage, Broccoli (monitor the buds daily to catch them while they are perfectly dense), Cauliflower (heads the moment they reach 6 to 8 inches and are perfectly tight), Carrots through summer (reach peak sweetness when the foliage hits 12+ inches tall and the root shoulders poking out of the soil are 3/4 to 1 inch thick) |
Late June – Early July (on track 2026)
Daylilies, Ocean Spray blooming. Himalayan blackberries starting to form green berries after blooms fade.
| Harvest begins: Sweet Cherries, early Plums, Mulberries, Juneberries, Currants, Gooseberries, early Blueberries, Red Huckleberries, Blue Elderflowers, Bush Beans, Cucumbers, Summer Squash, Garlic bulbs (bottom 2 to 3 leaves turn completely brown and paper-dry.), Onion bulbs (Let them sit in the dry soil for 7 to 10 days until roughly 50% to 80% of the patch has flopped over), Pie Cherries and Plums are close behind. |
Late-July/Early August (on track 2026)
Himalayan blackberries starting to turn red.
| Harvest begins: Early Sweet Corn, Pole Beans, new Potatoes, Beets, early Peaches, Japanese Plums, early European Plums, early Apples, early European Pears, Summer Raspberries, Evergreen Huckleberries, Red Elderberries |
Mid-Late August (on track 2026)
When Himalayan Blackberries are in peak fruit.
| Transplant: Kale, Broccoli, Cauliflower, Brussels Sprout Provide temporary shade cloth or leafy branch covers for newly transplanted brassicas for the first 3-5 days to prevent heat scorch. | Harvest Begins: Cherry Tomatoes, Eggplant, Peppers, Tomatillos, Melons (look for that creamy yellow under-belly), Peaches, Asian Pears, European Pears, Apples, Italian Prunes, European Plums, Figs |
Late August/Early September (on track 2026)
Pacific Crabapples are ripening.
| Start Seed Outdoors: Radish, Arugula, Spinach, Mustard Greens, Lettuce, Cilantro, Parsley, Foxgloves, Hollyhock, Money Plant, Primrose (shady location). | Harvest begins: Corn, Slicing Tomatoes, Potatoes (look for green growth to die off, stop watering once growth turns yellow, harvest after a couple weeks), Pawpaws |
Mid September – Early October
When Acorns are beginning to fall.
| Start Seed Outdoors: Cover Crops like Crimson Clover, Winter Field Peas, or Hairy Vetch | Harvest begins: Blue Elderberries, Hazlenuts, Quince, Autumn Olive |
Late September – Mid October
When native Oaks and Hazelnuts begin a heavy drop of their acorns/nuts.
| Start Bulbs/Cloves Outdoors: Garlic, Shallot, Alliums, Crocus, Daffodil, Muscari | Harvest begins: Fennel, Winter Squash, Pumpkins (start checking the woodiness of your squash stems) |
Late October – Mid November
When the first frost kills summer annuals.
| Start Bulbs Outdoors: Tulips | Harvest begins: Salsify, Fall Broccoli (monitor the buds daily to catch them while they are perfectly dense), Fall Cauliflower (when it is 6 to 8 inches wide, compact, smooth, and tight), Medlars, Highbush Cranberries, Persimmon, Rose hips |
Late November – Early February
Leaves are gone, all is dormant.
| Harvest begins: Fall Brussels Sprouts (Harvest individual sprouts when they are 1 to 1.5 inches wide and feel rock-hard when squeezed), Jerusalem Artichokes (Sunchokes), scionwood (this is the prime window to clip dormant, pencil-thick twigs from your apples, pears, plums, and cherries. You store these cuttings in the refrigerator to graft onto new rootstocks in the spring) | Protect Tools: Drain hoses, turn off outdoor spigots, and oil hand tools. Mulch Empty Beds: Cover any bare soil with leaves or straw to prevent winter rains from washing away nutrients. Order Seeds: Use January to plan layouts and secure seeds before the spring rush begins. REST!!! |
Don’t forget to go to the Plant Compatibility Table for companion planting info as well.
Hollow Hills Ranch 