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