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Rel. frost
Last spring frost (0°C) 21 May Frost 1 of 4 years · 20 years of data
Frost-free season 141 days 21 May – 9 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)
2 – 16 Apr
12 Jun
5-7 wk
21 May
17 Jul
0 wk
22 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
9 – 23 Apr
24 Jun
4-6 wk
21 May
22 Jul
0 wk
22 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Fleece
18 Mar – 15 Apr
11 Apr
8-12 wk
10 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Apr
7 Jun
5-7 wk
21 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
27 May – 3 Jun
5 Jun
3-4 wk
24 Jun
26 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
20 – 27 May
4 Jun
4-5 wk
24 Jun
2 Jul
5 wk after
3 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
3 – 10 Jun
3-4 wk
1 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
26 Feb – 26 Mar
28 Mar
8-12 wk
21 May
23 May
0 wk
3 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
12 Jun
0 wk
22 May
2 Jun
0 wk
Maize
Zea mays
13 – 20 May
26 May
3-4 wk
10 Jun
16 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
29 Apr – 6 May
1 Jul
3-4 wk
27 May
22 Jul
1 wk after
3 Jun
12 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
21 May
2 Jul
0 wk
21 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Apr
7 Jun
5-7 wk
21 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Potato
Solanum tuberosum
19 Apr – 3 May
28 May
4-6 wk
31 May
25 Jun
1 wk after
31 May
15 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Apr
17 Jun
5-7 wk
21 May
22 Jul
0 wk
22 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
27 May – 3 Jun
19 Jun
3-4 wk
24 Jun
10 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
29 Apr – 6 May
15 Jun
3-4 wk
27 May
6 Jul
1 wk after
3 Jun
26 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Lettuce
Lactuca sativa
23 – 30 Apr
6 Jul
3-4 wk
21 May
27 Jul
0 wk
22 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
23 Apr – 7 May
29 May
2-4 wk
21 May
12 Jun
0 wk
21 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
12 Jun
0 wk
22 May
2 Jun
0 wk
Spinach
Spinacia oleracea
23 – 30 Apr
21 Jul
3-4 wk
21 May
11 Aug
0 wk
18 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
15 – 29 Jun
4-6 wk
27 Jul
10 wk after
Garden tomato
Solanum lycopersicum
15 – 29 Apr
5 May
6-8 wk
10 Jun
16 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
13 – 27 May
21 Jun
2-4 wk
10 Jun
5 Jul
3 wk after
3 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
9 – 23 Apr
19 Jun
4-6 wk
21 May
17 Jul
0 wk
Garden pea
Pisum sativum
23 – 30 Apr
21 Jun
3-4 wk
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
13 – 27 May
28 May
4-6 wk
24 Jun
25 Jun
5 wk after
Lemon balm
Melissa officinalis
12 – 26 Mar
17 May
8-10 wk
21 May
12 Jul
0 wk
15 Jun
2 Jul
4 wk after
Dill
Anethum graveolens
22 May
22 Jul
0 wk
Wild chives
Allium schoenoprasum
26 Mar – 9 Apr
31 May
6-8 wk
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Spearmint
Mentha spicata
26 Feb – 26 Mar
17 May
8-12 wk
21 May
12 Jul
0 wk
15 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
21 May
11 Aug
0 wk
3 Jun
1 Aug
2 wk after
Garden sage
Salvia officinalis
18 Mar – 1 Apr
2 May
8-10 wk
27 May
27 Jun
1 wk after
Common thyme
Thymus vulgaris
12 – 26 Mar
7 May
8-10 wk
21 May
2 Jul
0 wk
Oregano
Origanum vulgare
26 Mar – 9 Apr
21 May
6-8 wk
21 May
2 Jul
0 wk
15 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
26 Mar – 9 Apr
21 May
6-8 wk
21 May
2 Jul
0 wk
22 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
18 Feb – 18 Mar
3 Apr
10-14 wk
27 May
12 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
27 May – 3 Jun
4 Jun
3-4 wk
24 Jun
25 Jun
5 wk after
Cornflower
Centaurea cyanus
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Statice
Limonium sinuatum
1 – 15 Apr
4 May
8-10 wk
10 Jun
29 Jun
3 wk after
Sweet William
Dianthus barbatus
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
31 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
15 – 29 Apr
18 May
6-8 wk
10 Jun
29 Jun
3 wk after
27 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
10 – 24 Apr
20 May
6-8 wk
5 Jun
1 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
20 Apr – 18 May
3 Jun
4-8 wk
15 Jun
1 Jul
4 wk after
15 Jun
21 Jun
4 wk after
Foxglove
Digitalis purpurea
12 – 26 Mar
8-10 wk
21 May
0 wk
3 Jun
2 wk after
Busy lizzie
Impatiens walleriana
1 – 29 Apr
23 Jun
8-12 wk
24 Jun
18 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
15 – 29 Apr
28 May
6-8 wk
10 Jun
9 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
29 Apr – 13 May
6 May
4-6 wk
10 Jun
3 wk after
Chinese lantern
Physalis alkekengi
18 Mar – 1 Apr
17 Apr
8-10 wk
27 May
12 Jun
1 wk after
Love in a mist
Nigella damascena
21 May
27 Jun
0 wk
22 May
17 Jun
0 wk
Strawflower
Xerochrysum bracteatum
15 – 29 Apr
8 May
6-8 wk
10 Jun
19 Jun
3 wk after
27 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
4 Mar – 1 Apr
17 Apr
8-12 wk
27 May
12 Jun
1 wk after
Cardoon
Cynara cardunculus
18 Mar – 15 Apr
18 Mar
8-12 wk
10 Jun
3 wk after
Regal-foxtail
Ptilotus nobilis
1 – 29 Apr
20 Apr
8-12 wk
24 Jun
5 wk after
Globe amaranth
Gomphrena globosa
29 Apr – 13 May
4 May
6-8 wk
24 Jun
5 wk after
Corn poppy
Papaver rhoeas
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Snapdragon
Antirrhinum majus
26 Feb – 26 Mar
7 May
8-12 wk
21 May
2 Jul
0 wk
31 May
22 Jun
1 wk after
Flossflower
Ageratum houstonianum
15 – 29 Apr
14 May
8-10 wk
24 Jun
9 Jul
5 wk after
Sweet pea
Lathyrus odoratus
26 Mar – 16 Apr
28 May
5-8 wk
21 May
2 Jul
0 wk
Stock
Matthiola incana
26 Mar – 9 Apr
31 May
6-8 wk
21 May
12 Jul
0 wk
3 Jun
2 Jul
2 wk after
Wormwood
Artemisia absinthium
26 Mar – 9 Apr
1 May
6-8 wk
21 May
12 Jun
0 wk
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
13 – 27 May
13 May
4-6 wk
24 Jun
5 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Mar
17 May
8-10 wk
21 May
12 Jul
0 wk
31 May
2 Jul
1 wk after
Petunia
Petunia
18 Mar – 15 Apr
4 May
8-12 wk
10 Jun
29 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
1 – 15 Apr
1 May
6-8 wk
27 May
12 Jun
1 wk after
3 Jul
6 wk after
Common zinnia
Zinnia elegans
29 Apr – 13 May
5 Jun
4-6 wk
10 Jun
3 Jul
3 wk after
Common morning glory
Ipomoea purpurea
20 May – 3 Jun
4 Jun
3-5 wk
24 Jun
25 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
29 Apr – 13 May
3 Jun
4-6 wk
10 Jun
1 Jul
3 wk after
3 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
13 Apr – 11 May
20 May
8-12 wk
6 Jul
15 Jul
7 wk after
Bee balm
Monarda didyma
26 Feb – 26 Mar
17 Apr
8-12 wk
21 May
12 Jun
0 wk
15 Jun
4 wk after
Yarrow
Achillea millefolium
26 Mar – 9 Apr
1 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Safflower
Carthamus tinctorius
21 May
12 Jun
0 wk
22 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
26 Mar – 9 Apr
21 May
6-8 wk
21 May
2 Jul
0 wk
5 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
9 – 23 Apr
4 Jun
4-6 wk
21 May
2 Jul
0 wk
3 Jun
22 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
18 Mar – 1 Apr
2 Apr
10-12 wk
10 Jun
11 Jun
3 wk after
Sunflower
Helianthus annuus
13 – 20 May
11 Jun
3-4 wk
10 Jun
2 Jul
3 wk after
15 Jun
22 Jun
4 wk after
China aster
Callistephus chinensis
15 – 29 Apr
31 May
6-8 wk
10 Jun
12 Jul
3 wk after
3 Jul
6 wk after
Annual phlox
Phlox drummondii
6 – 20 Apr
28 May
6-8 wk
1 Jun
9 Jul
2 wk after
3 Jul
6 wk after
Hollyhock
Alcea rosea
26 Mar – 9 Apr
6-8 wk
21 May
0 wk
3 Jun
2 wk after
Alpine delphinium
Delphinium elatum
26 Feb – 26 Mar
17 Apr
8-12 wk
21 May
12 Jun
0 wk
15 Jun
4 wk after
African marigold
Tagetes erecta
15 – 29 Apr
28 May
6-8 wk
10 Jun
9 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
1 – 15 Apr
21 May
6-8 wk
27 May
2 Jul
1 wk after
3 Jul
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
7 Apr
8-10 wk
21 May
2 Jun
0 wk
15 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
15 Apr – 13 May
14 May
6-10 wk
24 Jun
25 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
21 May
12 Jul
0 wk
22 May
2 Jul
0 wk
Painted tongue
Salpiglossis sinuata
1 – 15 Apr
7 May
8-10 wk
10 Jun
2 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
26 Mar – 9 Apr
1 May
6-8 wk
21 May
12 Jun
0 wk
3 Jun
2 wk after