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Rel. frost
Last spring frost (0°C) 22 May Frost 1 of 10 years · 20 years of data
Frost-free season 162 days 22 May – 31 Oct
Probability that frost is over

90% = 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)
5 – 19 May
14 Jun
5-7 wk
23 Jun
19 Jul
5 wk after
26 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
29 Apr – 13 May
26 Jun
4-6 wk
10 Jun
24 Jul
3 wk after
26 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Greenhouse
5 Apr – 3 May
15 Apr
8-12 wk
28 Jun
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
15 – 29 Mar
9 Jun
5-7 wk
3 May
14 Jul
3 wk before
22 May
4 Jul
Vid frost
Garden cucumber
Cucumis sativus
Fleece
9 – 16 Jun
9 Jun
3-4 wk
7 Jul
7 wk after
Florence Fennel
Foeniculum vulgare
8 – 15 Jun
4-5 wk
13 Jul
7 wk after
10 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
16 – 23 Jun
3-4 wk
14 Jul
8 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Feb – 27 Mar
30 Mar
8-12 wk
22 May
25 May
Vid frost
12 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
26 May
14 Jun
1 wk after
26 May
4 Jun
1 wk after
Maize
Zea mays
Fleece
31 May – 7 Jun
3-4 wk
28 Jun
5 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 May – 2 Jun
3 Jul
3-4 wk
23 Jun
24 Jul
5 wk after
12 Jun
14 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 May
24 Jun
Vid frost
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
15 – 29 Mar
9 Jun
5-7 wk
3 May
14 Jul
3 wk before
22 May
4 Jul
Vid frost
Potato
Solanum tuberosum
26 Apr – 10 May
6 Jun
4-6 wk
7 Jun
4 Jul
2 wk after
7 Jun
24 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
15 – 29 Mar
19 Jun
5-7 wk
3 May
24 Jul
3 wk before
26 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
15 – 22 Jun
3-4 wk
13 Jul
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 May – 2 Jun
18 Jun
3-4 wk
23 Jun
9 Jul
5 wk after
12 Jun
29 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
29 Apr – 13 May
21 Jun
4-6 wk
10 Jun
19 Jul
3 wk after
Lettuce
Lactuca sativa
18 – 25 Apr
8 Jul
3-4 wk
16 May
29 Jul
1 wk before
26 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
4 – 18 Apr
21 Jun
4-6 wk
16 May
19 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Apr – 8 May
31 May
2-4 wk
22 May
14 Jun
Vid frost
22 May
4 Jun
Vid frost
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
26 May
14 Jun
1 wk after
26 May
4 Jun
1 wk after
Spinach
Spinacia oleracea
11 – 18 Apr
23 Jul
3-4 wk
9 May
13 Aug
2 wk before
18 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
23 Jun – 7 Jul
4-6 wk
4 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
3 – 17 May
9 May
6-8 wk
28 Jun
5 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
9 – 23 Jun
16 Jun
2-4 wk
7 Jul
7 wk after
10 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
29 Apr – 13 May
21 Jun
4-6 wk
10 Jun
19 Jul
3 wk after
Garden pea
Pisum sativum
11 – 18 Apr
23 Jun
3-4 wk
9 May
14 Jul
2 wk before
26 May
4 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
1 – 15 Jun
4-6 wk
13 Jul
7 wk after
Lemon balm
Melissa officinalis
13 – 27 Mar
19 May
8-10 wk
22 May
14 Jul
Vid frost
26 Jun
4 Jul
5 wk after
Dill
Anethum graveolens
26 May
24 Jul
1 wk after
Wild chives
Allium schoenoprasum
8 – 22 Mar
2 Jun
6-8 wk
3 May
14 Jul
3 wk before
26 May
4 Jul
1 wk after
Spearmint
Mentha spicata
14 Feb – 14 Mar
19 May
8-12 wk
9 May
14 Jul
2 wk before
26 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
12 Jun
3 Aug
3 wk after
Garden sage
Salvia officinalis
14 – 28 Apr
4 May
8-10 wk
23 Jun
29 Jun
5 wk after
Common thyme
Thymus vulgaris
1 – 15 Apr
9 May
8-10 wk
10 Jun
4 Jul
3 wk after
Oregano
Origanum vulgare
1 – 15 Apr
23 May
6-8 wk
27 May
4 Jul
1 wk after
26 Jun
5 wk after
Parsley
Petroselinum crispum
14 – 28 Mar
23 May
6-8 wk
9 May
4 Jul
2 wk before
26 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
17 Mar – 14 Apr
5 Apr
10-14 wk
23 Jun
5 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
15 – 22 Jun
3-4 wk
13 Jul
7 wk after
Cornflower
Centaurea cyanus
9 May
14 Jul
2 wk before
26 May
4 Jul
1 wk after
Statice
Limonium sinuatum
28 Apr – 12 May
30 Apr
8-10 wk
7 Jul
7 wk after
Sweet William
Dianthus barbatus
14 – 28 Mar
6-8 wk
9 May
2 wk before
7 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
12 – 26 May
14 May
6-8 wk
7 Jul
7 wk after
4 Aug
11 wk after
Pinnate dahlia
Dahlia × pinnata
9 – 23 May
22 May
6-8 wk
4 Jul
6 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
1 – 29 May
5 Jun
4-8 wk
26 Jun
3 Jul
5 wk after
26 Jun
5 wk after
Foxglove
Digitalis purpurea
28 Feb – 14 Mar
8-10 wk
9 May
2 wk before
12 Jun
3 wk after
Busy lizzie
Impatiens walleriana
20 Apr – 18 May
17 Jun
8-12 wk
13 Jul
12 Aug
7 wk after
Creeping zinnia
Sanvitalia procumbens
12 – 26 May
24 May
6-8 wk
7 Jul
7 wk after
Hyacinth bean
Dolichos lablab
Season too short
26 May – 9 Jun
4-6 wk
7 Jul
7 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Apr
19 Apr
8-10 wk
23 Jun
5 wk after
Love in a mist
Nigella damascena
26 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
12 – 26 May
6-8 wk
7 Jul
7 wk after
4 Aug
11 wk after
Purple-top vervain
Verbena bonariensis
31 Mar – 28 Apr
19 Apr
8-12 wk
23 Jun
5 wk after
Cardoon
Cynara cardunculus
14 Apr – 12 May
8-12 wk
7 Jul
7 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
14 Apr – 12 May
22 Apr
8-12 wk
7 Jul
7 wk after
Globe amaranth
Gomphrena globosa
Fleece
12 – 26 May
6-8 wk
7 Jul
7 wk after
Corn poppy
Papaver rhoeas
26 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
21 Feb – 21 Mar
9 May
8-12 wk
16 May
4 Jul
1 wk before
7 Jun
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
4 – 18 May
10 May
8-10 wk
13 Jul
7 wk after
Sweet pea
Lathyrus odoratus
14 Mar – 4 Apr
30 May
5-8 wk
9 May
4 Jul
2 wk before
Stock
Matthiola incana
21 Mar – 4 Apr
2 Jun
6-8 wk
16 May
14 Jul
1 wk before
12 Jun
4 Jul
3 wk after
Wormwood
Artemisia absinthium
14 – 28 Mar
3 May
6-8 wk
9 May
14 Jun
2 wk before
12 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
17 – 31 May
31 May
4-6 wk
28 Jun
28 Jun
5 wk after
Garden pansy
Viola × wittrockiana
22 Feb – 8 Mar
19 May
8-10 wk
3 May
14 Jul
3 wk before
7 Jun
4 Jul
2 wk after
Petunia
Petunia
14 Apr – 12 May
30 Apr
8-12 wk
7 Jul
7 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Apr – 12 May
3 May
6-8 wk
23 Jun
5 wk after
10 Jul
7 wk after
Common zinnia
Zinnia elegans
26 May – 9 Jun
30 May
4-6 wk
7 Jul
7 wk after
Common morning glory
Ipomoea purpurea
8 – 22 Jun
3-5 wk
13 Jul
7 wk after
Garden cosmos
Cosmos bipinnatus
26 May – 9 Jun
5 Jun
4-6 wk
7 Jul
7 wk after
10 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
21 Apr – 19 May
15 May
8-12 wk
14 Jul
8 wk after
Bee balm
Monarda didyma
27 Feb – 27 Mar
19 Apr
8-12 wk
22 May
14 Jun
Vid frost
26 Jun
5 wk after
Yarrow
Achillea millefolium
14 – 28 Mar
3 Apr
6-8 wk
9 May
15 May
2 wk before
12 Jun
3 wk after
Safflower
Carthamus tinctorius
9 May
14 Jun
2 wk before
26 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
8 – 22 Mar
23 May
6-8 wk
3 May
4 Jul
3 wk before
22 May
24 Jun
Vid frost
Bishop's flower
Ammi majus
20 Apr – 4 May
6 Jun
4-6 wk
1 Jun
4 Jul
1 wk after
12 Jun
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
5 – 19 Apr
5 Apr
10-12 wk
28 Jun
5 wk after
Sunflower
Helianthus annuus
9 – 16 Jun
13 Jun
3-4 wk
7 Jul
7 wk after
26 Jun
5 wk after
China aster
Callistephus chinensis
12 – 26 May
2 Jun
6-8 wk
7 Jul
14 Jul
7 wk after
10 Jul
7 wk after
Annual phlox
Phlox drummondii
3 – 17 May
24 May
6-8 wk
28 Jun
5 Jul
5 wk after
10 Jul
7 wk after
Hollyhock
Alcea rosea
14 – 28 Mar
6-8 wk
9 May
2 wk before
12 Jun
3 wk after
Alpine delphinium
Delphinium elatum
18 Mar – 15 Apr
19 Apr
8-12 wk
10 Jun
14 Jun
3 wk after
26 Jun
5 wk after
African marigold
Tagetes erecta
12 – 26 May
24 May
6-8 wk
7 Jul
7 wk after
Black-eyed Susan
Rudbeckia hirta
28 Apr – 12 May
23 May
6-8 wk
23 Jun
4 Jul
5 wk after
10 Jul
7 wk after
Wood sage
Salvia nemorosa
18 Mar – 1 Apr
9 Apr
8-10 wk
27 May
4 Jun
1 wk after
26 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
4 May – 1 Jun
9 May
6-10 wk
13 Jul
7 wk after
California goldenpoppy
Eschscholzia californica
26 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
28 Apr – 12 May
9 May
8-10 wk
7 Jul
7 wk after
Water forget-me-not
Myosotis scorpioides
14 – 28 Mar
3 May
6-8 wk
9 May
14 Jun
2 wk before
12 Jun
3 wk after