Seed Starting Calendar

Heirloom Varieties — What to Plant & When
Start Indoors
Direct Sow
Transplant Out
Seed Variety Feb Mar Apr May Jun Jul Aug
Fruiting Vegetables
Roma Tomatoes
In
In
Tr
Jalapeño Peppers
In
In
Tr
California Wonder Peppers
In
In
Tr
Crimson Sweet Watermelon
In
In+S
S
Pickling Cucumbers
In
S
Dark Green Zucchini
In
S
Jack-o-Lantern Pumpkin
S
Luffa Sponge Gourd
S
Herbs
Large Leaf Basil
In
Tr
Coriander (Cilantro)
In
S
S
Parsley
In
S
S
Catnip
S
Root Vegetables
Sugar Beets
S
S
S
Bulls Blood Beets
S
S
S
Snowball Turnips
S
S
S
Scarlett Nantes Carrots
S
S
S
Legumes & Corn
Provider Green Bush Beans
S
S
S
Sugar Lace Snap Peas
S
Yellow Dent Corn
S
Leafy Greens & Brassicas
Utah Celery
In
In
Tr
Butter Crunch Lettuce
In
S
S
S
Red Russian Kale
S
S
S
Long Island Brussels Sprouts
In
In
Tr
White Bunching Onion
S
S
Monthly Breakdown — Spring & Summer
February — Start Indoors
  • Jalapeño Peppers
    Start indoors, keep warm 78–85°F
  • California Wonder Peppers
    Use a heat mat for best germination
  • Roma Tomatoes
    8–10 weeks before last frost
  • Utah Celery
    Long season crop — start early
  • Long Island Brussels Sprouts
    Need full season, 90–100 days
March — More Indoor Starts
  • Roma Tomatoes
    Last call for indoor starts
  • Large Leaf Basil
    Wait until soil warms to transplant
  • Butter Crunch Lettuce
    Or direct sow in mild climates
  • Crimson Sweet Watermelon
    Use peat pots for transplanting
  • Pickling Cucumbers
    Last indoor start or direct sow
  • Dark Green Zucchini
    Big seeds, 1–2 per cell
April — Direct Sow Begins
  • Sugar Beets / Bulls Blood Beets
    Sow 1” deep, thin to 3”
  • Snowball Turnips
    Fast grower — 50–60 days
  • Scarlett Nantes Carrots
    ¼” deep in loose soil
  • Green Bush Beans
    Soil 60°F+, direct sow only
  • Sugar Lace Snap Peas
    Can sow before frost in Zone 5+
  • Yellow Dent Corn
    Plant in blocks for pollination
May — Transplant Out
  • Tomatoes & Peppers
    Harden off 1 week before planting
  • Utah Celery
    Transplant when 4–6” tall
  • Brussels Sprouts & Kale
    After all frost danger has passed
  • Jack-o-Lantern Pumpkin
    Space 6′ apart
  • Luffa Sponge Gourd
    Needs trellis and long season
  • White Bunching Onion
    Harvest fall or overwinter
June — Succession Planting
  • Green Bush Beans
    Sow every 2 weeks for continuous harvest
  • Sugar Beets / Bulls Blood
    Fall beets are sweeter
  • Scarlett Nantes Carrots
    August–September harvest
  • Coriander (Cilantro)
    Spring plants bolted — new crop
  • Butter Crunch Lettuce
    Shade-tolerant summer plant
July–August — Fall Garden
  • Red Russian Kale
    Overwinters in Zone 5+, sweetens after frost
  • Butter Crunch Lettuce
    Fall crop tastes better than summer
  • Sugar Beets / Bulls Blood
    Harvest before hard freeze
  • Snowball Turnips
    Fast — ready before freeze
  • White Bunching Onion
    Overwinters, harvest early spring
Succession planting: Sow beans, beets, carrots, and cilantro every 2–3 weeks from June through August. Each planting matures later, giving you a steady harvest all season.
Trees, Quick Reference & Growing Tips
Tree Seeds — Year-Round Planning
Japanese Maple
  • Spring or Fall
    Fall preferred. Shade when young.
Red Cedar
  • Fall
    Bare-root in dormant season.
Southern Yew
  • Spring
    Slow grower. Good hedge plant.
Chinese Elm
  • Spring
    Drought-tolerant once established.
Plant trees where they will stay permanently. Most do not transplant well once roots establish. Dig deep, water well the first year, and mulch.
Quick Reference — At a Glance
Start Indoors
  • Roma Tomatoes
  • Jalapeño Peppers
  • California Wonder Peppers
  • Large Leaf Basil
  • Utah Celery
  • Long Island Brussels Sprouts
  • Butter Crunch Lettuce
  • Dark Green Zucchini
Direct Sow
  • Sugar Beets
  • Bulls Blood Beets
  • Snowball Turnips
  • Scarlett Nantes Carrots
  • Green Bush Beans
  • Sugar Lace Snap Peas
  • Yellow Dent Corn
  • White Bunching Onion
  • Catnip, Coriander, Parsley
  • Red Russian Kale
  • Pickling Cucumbers
  • Dark Green Zucchini
  • Jack-o-Lantern Pumpkin
  • Crimson Sweet Watermelon
  • Luffa Sponge Gourd
Trees
  • Japanese Maple
  • Red Cedar
  • Southern Yew
  • Chinese Elm
Key Growing Tips
  • Beans & Peas
    Never transplant — sow directly. They hate root disturbance.
  • Corn
    Plant in blocks (3+ rows), not single rows, for wind pollination.
  • Peppers
    Need 78–85°F to germinate. Heat mat is worth it.
  • Carrots & Beets
    Thin seedlings aggressively — crowding gives tiny harvest.
  • Cucumbers & Squash
    Direct sow is easiest. If transplanting, use peat pots.
  • Cilantro
    Bolts in heat. Succession sow every 3 weeks.
  • Kale
    Fall-harvested kale is sweeter. Frost improves flavor.
  • Brussels Sprouts
    Long season (90–100 days). Start early, harvest late.