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Rel. frost
Last spring frost (0°C) 20 May Frost 1 of 10 years · 20 years of data
Frost-free season 152 days 20 May – 19 Oct
Probability that frost is over

90% = Half of years are frost-free by this date. More about frost & season →

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Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
30 Apr – 14 May
17 Jun
5-7 wk
18 Jun
22 Jul
4 wk after
13 May
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
22 Apr – 6 May
29 Jun
4-6 wk
3 Jun
27 Jul
2 wk after
13 May
17 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
1 – 29 Apr
8-12 wk
24 Jun
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
7 – 21 Mar
12 Jun
5-7 wk
25 Apr
17 Jul
4 wk before
8 May
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
27 May – 3 Jun
30 May
3-4 wk
24 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
9 – 16 Jun
9 Jun
4-5 wk
14 Jul
8 wk after
25 Jun
27 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
18 – 25 Jun
3-4 wk
16 Jul
8 wk after
Onion
Allium cepa (Cepa-gruppen)
25 Feb – 25 Mar
2 Apr
8-12 wk
20 May
28 May
Vid frost
30 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
13 May
17 Jun
1 wk before
13 May
7 Jun
1 wk before
Maize
Zea mays
Greenhouse
14 – 21 May
20 May
3-4 wk
11 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
21 – 28 May
6 Jul
3-4 wk
18 Jun
27 Jul
4 wk after
30 May
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
8 May
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
7 – 21 Mar
12 Jun
5-7 wk
25 Apr
17 Jul
4 wk before
8 May
7 Jul
2 wk before
Potato
Solanum tuberosum
13 – 27 Apr
9 Jun
4-6 wk
25 May
7 Jul
1 wk after
25 May
27 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
7 – 21 Mar
22 Jun
5-7 wk
25 Apr
27 Jul
4 wk before
13 May
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
8 – 15 Jun
3-4 wk
6 Jul
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
21 – 28 May
1 Jul
3-4 wk
18 Jun
22 Jul
4 wk after
30 May
12 Jul
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
22 Apr – 6 May
24 Jun
4-6 wk
3 Jun
22 Jul
2 wk after
Lettuce
Lactuca sativa
15 – 22 Apr
11 Jul
3-4 wk
13 May
1 Aug
1 wk before
13 May
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
1 – 15 Apr
24 Jun
4-6 wk
13 May
22 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
10 – 24 Apr
3 Jun
2-4 wk
8 May
17 Jun
2 wk before
8 May
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
13 May
17 Jun
1 wk before
13 May
7 Jun
1 wk before
Spinach
Spinacia oleracea
7 – 14 Apr
26 Jul
3-4 wk
5 May
16 Aug
2 wk before
2 May
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
16 – 30 Jun
4-6 wk
28 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
16 – 30 Apr
29 Apr
6-8 wk
11 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
27 May – 10 Jun
6 Jun
2-4 wk
24 Jun
5 wk after
10 Jun
10 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
22 Apr – 6 May
24 Jun
4-6 wk
3 Jun
22 Jul
2 wk after
Garden pea
Pisum sativum
7 – 14 Apr
26 Jun
3-4 wk
5 May
17 Jul
2 wk before
13 May
7 Jul
1 wk before

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Greenhouse
13 – 27 May
24 May
4-6 wk
24 Jun
5 wk after
Lemon balm
Melissa officinalis
11 – 25 Mar
22 May
8-10 wk
20 May
17 Jul
Vid frost
10 Jun
7 Jul
3 wk after
Dill
Anethum graveolens
13 May
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
28 Feb – 14 Mar
5 Jun
6-8 wk
25 Apr
17 Jul
4 wk before
13 May
7 Jul
1 wk before
Spearmint
Mentha spicata
10 Feb – 10 Mar
22 May
8-12 wk
5 May
17 Jul
2 wk before
10 Jun
7 Jul
3 wk after
Coriander
Coriandrum sativum
30 May
6 Aug
1 wk after
Garden sage
Salvia officinalis
9 – 23 Apr
7 May
8-10 wk
18 Jun
2 Jul
4 wk after
Common thyme
Thymus vulgaris
25 Mar – 8 Apr
12 May
8-10 wk
3 Jun
7 Jul
2 wk after
Oregano
Origanum vulgare
31 Mar – 14 Apr
26 May
6-8 wk
26 May
7 Jul
1 wk after
10 Jun
27 Jun
3 wk after
Parsley
Petroselinum crispum
10 – 24 Mar
26 May
6-8 wk
5 May
7 Jul
2 wk before
13 May
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
12 Mar – 9 Apr
8 Apr
10-14 wk
18 Jun
4 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
Greenhouse
27 May – 3 Jun
31 May
3-4 wk
24 Jun
5 wk after
Cornflower
Centaurea cyanus
5 May
17 Jul
2 wk before
13 May
7 Jul
1 wk before
Statice
Limonium sinuatum
Fleece
15 – 29 Apr
22 Apr
8-10 wk
24 Jun
5 wk after
Sweet William
Dianthus barbatus
10 – 24 Mar
6-8 wk
5 May
2 wk before
25 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
29 Apr – 13 May
6 May
6-8 wk
24 Jun
5 wk after
5 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
23 Apr – 7 May
19 May
6-8 wk
18 Jun
30 Jun
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
15 Apr – 13 May
14 May
4-8 wk
10 Jun
11 Jun
3 wk after
10 Jun
3 wk after
Foxglove
Digitalis purpurea
24 Feb – 10 Mar
8-10 wk
5 May
2 wk before
30 May
1 wk after
Busy lizzie
Impatiens walleriana
21 Apr – 19 May
31 May
8-12 wk
14 Jul
26 Jul
8 wk after
Creeping zinnia
Sanvitalia procumbens
11 – 25 May
6-8 wk
6 Jul
7 wk after
Hyacinth bean
Dolichos lablab
Season too short
25 May – 8 Jun
4-6 wk
6 Jul
7 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Apr
22 Apr
8-10 wk
18 Jun
4 wk after
Love in a mist
Nigella damascena
13 May
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
Greenhouse
16 – 30 Apr
12 May
6-8 wk
11 Jun
23 Jun
3 wk after
17 Jun
4 wk after
Purple-top vervain
Verbena bonariensis
26 Mar – 23 Apr
22 Apr
8-12 wk
18 Jun
4 wk after
Cardoon
Cynara cardunculus
13 Apr – 11 May
8-12 wk
6 Jul
7 wk after
Regal-foxtail
Ptilotus nobilis
Season too short
1 – 29 Apr
16 Apr
8-12 wk
24 Jun
5 wk after
Globe amaranth
Gomphrena globosa
Season too short
29 Apr – 13 May
30 Apr
6-8 wk
24 Jun
5 wk after
Corn poppy
Papaver rhoeas
13 May
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
18 Feb – 18 Mar
12 May
8-12 wk
13 May
7 Jul
1 wk before
25 May
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
27 Apr – 11 May
2 May
8-10 wk
6 Jul
7 wk after
Sweet pea
Lathyrus odoratus
10 – 31 Mar
2 Jun
5-8 wk
5 May
7 Jul
2 wk before
Stock
Matthiola incana
18 Mar – 1 Apr
5 Jun
6-8 wk
13 May
17 Jul
1 wk before
30 May
7 Jul
1 wk after
Wormwood
Artemisia absinthium
10 – 24 Mar
6 May
6-8 wk
5 May
17 Jun
2 wk before
30 May
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Season too short
13 – 27 May
4-6 wk
24 Jun
5 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Feb
22 May
8-10 wk
25 Apr
17 Jul
4 wk before
25 May
7 Jul
1 wk after
Petunia
Petunia
Fleece
1 – 29 Apr
22 Apr
8-12 wk
24 Jun
5 wk after
Sweet Scabious
Scabiosa atropurpurea
23 Apr – 7 May
6 May
6-8 wk
18 Jun
4 wk after
25 Jun
5 wk after
Common zinnia
Zinnia elegans
Fleece
13 – 27 May
24 May
4-6 wk
24 Jun
5 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
20 May – 3 Jun
31 May
3-5 wk
24 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
13 – 27 May
2 Jun
4-6 wk
24 Jun
30 Jun
5 wk after
10 Jun
20 Jun
3 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
21 Apr – 19 May
5 May
8-12 wk
14 Jul
8 wk after
Bee balm
Monarda didyma
25 Feb – 25 Mar
22 Apr
8-12 wk
20 May
17 Jun
Vid frost
10 Jun
3 wk after
Yarrow
Achillea millefolium
10 – 24 Mar
6 Apr
6-8 wk
5 May
18 May
2 wk before
30 May
1 wk after
Safflower
Carthamus tinctorius
5 May
17 Jun
2 wk before
13 May
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
28 Feb – 14 Mar
26 May
6-8 wk
25 Apr
7 Jul
4 wk before
8 May
27 Jun
2 wk before
Bishop's flower
Ammi majus
18 Apr – 2 May
9 Jun
4-6 wk
30 May
7 Jul
1 wk after
30 May
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Season too short
1 – 15 Apr
1 Apr
10-12 wk
24 Jun
5 wk after
Sunflower
Helianthus annuus
8 – 15 Jun
16 Jun
3-4 wk
6 Jul
7 Jul
7 wk after
10 Jun
27 Jun
3 wk after
China aster
Callistephus chinensis
11 – 25 May
5 Jun
6-8 wk
6 Jul
17 Jul
7 wk after
25 Jun
7 Jul
5 wk after
Annual phlox
Phlox drummondii
29 Apr – 13 May
4 May
6-8 wk
24 Jun
5 wk after
25 Jun
5 wk after
Hollyhock
Alcea rosea
10 – 24 Mar
6-8 wk
5 May
2 wk before
30 May
1 wk after
Alpine delphinium
Delphinium elatum
11 Mar – 8 Apr
22 Apr
8-12 wk
3 Jun
17 Jun
2 wk after
10 Jun
3 wk after
African marigold
Tagetes erecta
11 – 25 May
6-8 wk
6 Jul
7 wk after
Black-eyed Susan
Rudbeckia hirta
23 Apr – 7 May
26 May
6-8 wk
18 Jun
7 Jul
4 wk after
25 Jun
27 Jun
5 wk after
Wood sage
Salvia nemorosa
17 – 31 Mar
12 Apr
8-10 wk
26 May
7 Jun
1 wk after
10 Jun
3 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
15 Apr – 13 May
10 May
6-10 wk
24 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
13 May
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
27 Apr – 11 May
12 May
8-10 wk
6 Jul
7 Jul
7 wk after
Water forget-me-not
Myosotis scorpioides
10 – 24 Mar
6 May
6-8 wk
5 May
17 Jun
2 wk before
30 May
7 Jun
1 wk after