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Method
Rel. frost
Last spring frost (0°C) 19 May Frost 1 of 4 years · 20 years of data
Frost-free season 145 days 19 May – 11 Oct
Probability that frost is over

75% = Half of years are frost-free by this date. More about frost & season →

Custom date

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
31 Mar – 14 Apr
15 Jun
5-7 wk
19 May
20 Jul
0 wk
23 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
7 – 21 Apr
27 Jun
4-6 wk
19 May
25 Jul
0 wk
23 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Fleece
23 Mar – 20 Apr
11 Apr
8-12 wk
15 Jun
4 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
31 Mar – 14 Apr
10 Jun
5-7 wk
19 May
15 Jul
0 wk
19 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
3 – 10 Jun
5 Jun
3-4 wk
1 Jul
6 wk after
Florence Fennel
Foeniculum vulgare
27 May – 3 Jun
7 Jun
4-5 wk
1 Jul
5 Jul
6 wk after
7 Jul
7 wk after
Butter bean
Phaseolus lunatus
Greenhouse
8 – 15 Jun
3-4 wk
6 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
24 Feb – 24 Mar
31 Mar
8-12 wk
19 May
26 May
0 wk
9 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
23 May
15 Jun
1 wk after
23 May
5 Jun
1 wk after
Maize
Zea mays
18 – 25 May
26 May
3-4 wk
15 Jun
16 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
29 Apr – 6 May
4 Jul
3-4 wk
27 May
25 Jul
1 wk after
9 Jun
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
19 May
5 Jul
0 wk
19 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
31 Mar – 14 Apr
10 Jun
5-7 wk
19 May
15 Jul
0 wk
19 May
5 Jul
0 wk
Potato
Solanum tuberosum
23 Apr – 7 May
3 Jun
4-6 wk
4 Jun
1 Jul
2 wk after
4 Jun
21 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
31 Mar – 14 Apr
20 Jun
5-7 wk
19 May
25 Jul
0 wk
23 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
3 – 10 Jun
21 Jun
3-4 wk
1 Jul
12 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
29 Apr – 6 May
15 Jun
3-4 wk
27 May
6 Jul
1 wk after
9 Jun
26 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
7 – 21 Apr
22 Jun
4-6 wk
19 May
20 Jul
0 wk
Lettuce
Lactuca sativa
21 – 28 Apr
9 Jul
3-4 wk
19 May
30 Jul
0 wk
23 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
7 – 21 Apr
22 Jun
4-6 wk
19 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
21 Apr – 5 May
1 Jun
2-4 wk
19 May
15 Jun
0 wk
19 May
5 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
23 May
15 Jun
1 wk after
23 May
5 Jun
1 wk after
Spinach
Spinacia oleracea
21 – 28 Apr
24 Jul
3-4 wk
19 May
14 Aug
0 wk
15 May
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
20 Jun – 4 Jul
4-6 wk
1 Aug
11 wk after
Garden tomato
Solanum lycopersicum
20 Apr – 4 May
5 May
6-8 wk
15 Jun
16 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
18 May – 1 Jun
23 Jun
2-4 wk
15 Jun
7 Jul
4 wk after
7 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
7 – 21 Apr
22 Jun
4-6 wk
19 May
20 Jul
0 wk
Garden pea
Pisum sativum
21 – 28 Apr
24 Jun
3-4 wk
19 May
15 Jul
0 wk
23 May
5 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
20 May – 3 Jun
30 May
4-6 wk
1 Jul
6 wk after
Lemon balm
Melissa officinalis
10 – 24 Mar
20 May
8-10 wk
19 May
15 Jul
0 wk
23 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
23 May
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
24 Mar – 7 Apr
3 Jun
6-8 wk
19 May
15 Jul
0 wk
23 May
5 Jul
1 wk after
Spearmint
Mentha spicata
24 Feb – 24 Mar
20 May
8-12 wk
19 May
15 Jul
0 wk
23 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
19 May
14 Aug
0 wk
9 Jun
4 Aug
3 wk after
Garden sage
Salvia officinalis
18 Mar – 1 Apr
5 May
8-10 wk
27 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
10 – 24 Mar
10 May
8-10 wk
19 May
5 Jul
0 wk
Oregano
Origanum vulgare
24 Mar – 7 Apr
24 May
6-8 wk
19 May
5 Jul
0 wk
23 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
24 Mar – 7 Apr
24 May
6-8 wk
19 May
5 Jul
0 wk
23 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
18 Feb – 18 Mar
6 Apr
10-14 wk
27 May
15 Jun
1 wk after

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
3 – 10 Jun
6 Jun
3-4 wk
1 Jul
6 wk after
Cornflower
Centaurea cyanus
19 May
15 Jul
0 wk
23 May
5 Jul
1 wk after
Statice
Limonium sinuatum
6 – 20 Apr
10 May
8-10 wk
15 Jun
5 Jul
4 wk after
Sweet William
Dianthus barbatus
24 Mar – 7 Apr
6-8 wk
19 May
0 wk
4 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
20 Apr – 4 May
24 May
6-8 wk
15 Jun
5 Jul
4 wk after
1 Aug
11 wk after
Pinnate dahlia
Dahlia × pinnata
12 – 26 Apr
24 May
6-8 wk
7 Jun
5 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
28 Apr – 26 May
7 Jun
4-8 wk
23 Jun
5 Jul
5 wk after
23 Jun
25 Jun
5 wk after
Foxglove
Digitalis purpurea
10 – 24 Mar
8-10 wk
19 May
0 wk
9 Jun
3 wk after
Busy lizzie
Impatiens walleriana
8 Apr – 6 May
28 Jun
8-12 wk
1 Jul
23 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
20 Apr – 4 May
3 Jun
6-8 wk
15 Jun
15 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
4 – 18 May
11 May
4-6 wk
15 Jun
4 wk after
Chinese lantern
Physalis alkekengi
18 Mar – 1 Apr
20 Apr
8-10 wk
27 May
15 Jun
1 wk after
Love in a mist
Nigella damascena
19 May
30 Jun
0 wk
23 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
20 Apr – 4 May
14 May
6-8 wk
15 Jun
25 Jun
4 wk after
1 Aug
11 wk after
Purple-top vervain
Verbena bonariensis
4 Mar – 1 Apr
20 Apr
8-12 wk
27 May
15 Jun
1 wk after
Cardoon
Cynara cardunculus
23 Mar – 20 Apr
8-12 wk
15 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
8 Apr – 6 May
22 Apr
8-12 wk
1 Jul
6 wk after
Globe amaranth
Gomphrena globosa
6 – 20 May
6 May
6-8 wk
1 Jul
6 wk after
Corn poppy
Papaver rhoeas
19 May
15 Jul
0 wk
23 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
24 Feb – 24 Mar
10 May
8-12 wk
19 May
5 Jul
0 wk
4 Jun
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
22 Apr – 6 May
20 May
8-10 wk
1 Jul
15 Jul
6 wk after
Sweet pea
Lathyrus odoratus
24 Mar – 14 Apr
31 May
5-8 wk
19 May
5 Jul
0 wk
Stock
Matthiola incana
24 Mar – 7 Apr
3 Jun
6-8 wk
19 May
15 Jul
0 wk
9 Jun
5 Jul
3 wk after
Wormwood
Artemisia absinthium
24 Mar – 7 Apr
4 May
6-8 wk
19 May
15 Jun
0 wk
9 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
20 May – 3 Jun
4-6 wk
1 Jul
6 wk after
Garden pansy
Viola × wittrockiana
10 – 24 Mar
20 May
8-10 wk
19 May
15 Jul
0 wk
4 Jun
5 Jul
2 wk after
Petunia
Petunia
23 Mar – 20 Apr
10 May
8-12 wk
15 Jun
5 Jul
4 wk after
Sweet Scabious
Scabiosa atropurpurea
1 – 15 Apr
4 May
6-8 wk
27 May
15 Jun
1 wk after
7 Jul
7 wk after
Common zinnia
Zinnia elegans
4 – 18 May
10 Jun
4-6 wk
15 Jun
8 Jul
4 wk after
Common morning glory
Ipomoea purpurea
27 May – 10 Jun
6 Jun
3-5 wk
1 Jul
6 wk after
Garden cosmos
Cosmos bipinnatus
4 – 18 May
7 Jun
4-6 wk
15 Jun
5 Jul
4 wk after
7 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
18 Apr – 16 May
22 May
8-12 wk
11 Jul
17 Jul
8 wk after
Bee balm
Monarda didyma
24 Feb – 24 Mar
20 Apr
8-12 wk
19 May
15 Jun
0 wk
23 Jun
5 wk after
Yarrow
Achillea millefolium
24 Mar – 7 Apr
4 Apr
6-8 wk
19 May
0 wk
9 Jun
3 wk after
Safflower
Carthamus tinctorius
19 May
15 Jun
0 wk
23 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
24 Mar – 7 Apr
24 May
6-8 wk
19 May
5 Jul
0 wk
1 May
25 Jun
3 wk before
Bishop's flower
Ammi majus
7 – 21 Apr
7 Jun
4-6 wk
19 May
5 Jul
0 wk
9 Jun
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
8 – 22 Apr
10-12 wk
1 Jul
6 wk after
Sunflower
Helianthus annuus
18 – 25 May
14 Jun
3-4 wk
15 Jun
5 Jul
4 wk after
23 Jun
25 Jun
5 wk after
China aster
Callistephus chinensis
20 Apr – 4 May
3 Jun
6-8 wk
15 Jun
15 Jul
4 wk after
7 Jul
7 wk after
Annual phlox
Phlox drummondii
8 – 22 Apr
3 Jun
6-8 wk
3 Jun
15 Jul
2 wk after
7 Jul
7 wk after
Hollyhock
Alcea rosea
24 Mar – 7 Apr
6-8 wk
19 May
0 wk
9 Jun
3 wk after
Alpine delphinium
Delphinium elatum
24 Feb – 24 Mar
20 Apr
8-12 wk
19 May
15 Jun
0 wk
23 Jun
5 wk after
African marigold
Tagetes erecta
20 Apr – 4 May
3 Jun
6-8 wk
15 Jun
15 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
1 – 15 Apr
24 May
6-8 wk
27 May
5 Jul
1 wk after
7 Jul
7 wk after
Wood sage
Salvia nemorosa
10 – 24 Mar
10 Apr
8-10 wk
19 May
5 Jun
0 wk
23 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
22 Apr – 20 May
16 May
6-10 wk
1 Jul
6 wk after
California goldenpoppy
Eschscholzia californica
19 May
15 Jul
0 wk
23 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
6 – 20 Apr
10 May
8-10 wk
15 Jun
5 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
24 Mar – 7 Apr
4 May
6-8 wk
19 May
15 Jun
0 wk
9 Jun
3 wk after