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Rel. frost
Last spring frost (0°C) 3 May Frost 9 of 10 years · 20 years of data
Frost-free season 143 days 3 May – 23 Sep
Probability that frost is over

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