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Rel. frost
Last spring frost (0°C) 2 May Frost 9 of 10 years · 20 years of data
Frost-free season 148 days 2 May – 27 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)
14 – 28 Mar
15 Jun
5-7 wk
2 May
20 Jul
0 wk
6 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
21 Mar – 4 Apr
27 Jun
4-6 wk
2 May
25 Jul
0 wk
6 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
22 Feb – 22 Mar
8-12 wk
17 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
14 – 28 Mar
10 Jun
5-7 wk
2 May
15 Jul
0 wk
2 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
19 – 26 Apr
3-4 wk
17 May
2 wk after
Florence Fennel
Foeniculum vulgare
10 – 17 May
25 May
4-5 wk
14 Jun
22 Jun
6 wk after
20 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
22 – 29 May
3-4 wk
19 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
7 Feb – 7 Mar
22 Mar
8-12 wk
2 May
17 May
0 wk
23 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
6 May
6 Jun
1 wk after
6 May
27 May
1 wk after
Maize
Zea mays
Season too short
5 – 12 Apr
3-4 wk
3 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
12 – 19 Apr
4 Jul
3-4 wk
10 May
25 Jul
1 wk after
23 May
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
2 May
5 Jul
0 wk
2 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
14 – 28 Mar
10 Jun
5-7 wk
2 May
15 Jul
0 wk
2 May
5 Jul
0 wk
Potato
Solanum tuberosum
6 – 20 Apr
21 May
4-6 wk
18 May
18 Jun
2 wk after
18 May
8 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
14 – 28 Mar
20 Jun
5-7 wk
2 May
25 Jul
0 wk
6 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
19 – 26 Apr
30 May
3-4 wk
17 May
20 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
12 – 19 Apr
30 May
3-4 wk
10 May
20 Jun
1 wk after
23 May
10 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
21 Mar – 4 Apr
22 Jun
4-6 wk
2 May
20 Jul
0 wk
Lettuce
Lactuca sativa
4 – 11 Apr
9 Jul
3-4 wk
2 May
30 Jul
0 wk
6 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
21 Mar – 4 Apr
22 Jun
4-6 wk
2 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
4 – 18 Apr
31 May
2-4 wk
2 May
14 Jun
0 wk
2 May
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
6 May
6 Jun
1 wk after
6 May
27 May
1 wk after
Spinach
Spinacia oleracea
4 – 11 Apr
24 Jul
3-4 wk
2 May
14 Aug
0 wk
28 Apr
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
3 – 17 Jun
4-6 wk
15 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
8 – 22 Mar
11 Mar
6-8 wk
3 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
5 – 19 Apr
1 Jun
2-4 wk
3 May
15 Jun
0 wk
23 May
5 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
21 Mar – 4 Apr
22 Jun
4-6 wk
2 May
20 Jul
0 wk
Garden pea
Pisum sativum
4 – 11 Apr
24 Jun
3-4 wk
2 May
15 Jul
0 wk
6 May
5 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
Greenhouse
5 – 19 Apr
8 May
4-6 wk
17 May
5 Jun
2 wk after
Lemon balm
Melissa officinalis
21 Feb – 7 Mar
20 May
8-10 wk
2 May
15 Jul
0 wk
6 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
6 May
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
7 – 21 Mar
3 Jun
6-8 wk
2 May
15 Jul
0 wk
6 May
5 Jul
1 wk after
Spearmint
Mentha spicata
7 Feb – 7 Mar
20 May
8-12 wk
2 May
15 Jul
0 wk
6 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
2 May
14 Aug
0 wk
23 May
4 Aug
3 wk after
Garden sage
Salvia officinalis
1 – 15 Mar
5 May
8-10 wk
10 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
21 Feb – 7 Mar
10 May
8-10 wk
2 May
5 Jul
0 wk
Oregano
Origanum vulgare
7 – 21 Mar
24 May
6-8 wk
2 May
5 Jul
0 wk
6 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
7 – 21 Mar
24 May
6-8 wk
2 May
5 Jul
0 wk
6 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
1 Feb – 1 Mar
31 Mar
10-14 wk
10 May
9 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
Greenhouse
19 – 26 Apr
15 May
3-4 wk
17 May
5 Jun
2 wk after
Cornflower
Centaurea cyanus
2 May
15 Jul
0 wk
6 May
5 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
8 – 22 Mar
10 Apr
8-10 wk
17 May
5 Jun
2 wk after
Sweet William
Dianthus barbatus
7 – 21 Mar
6-8 wk
2 May
0 wk
18 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
22 Mar – 5 Apr
24 Apr
6-8 wk
17 May
5 Jun
2 wk after
30 Jun
8 wk after
Pinnate dahlia
Dahlia × pinnata
26 Mar – 9 Apr
14 Apr
6-8 wk
21 May
26 May
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
11 Apr – 9 May
28 Apr
4-8 wk
6 Jun
5 wk after
6 Jun
5 wk after
Foxglove
Digitalis purpurea
21 Feb – 7 Mar
8-10 wk
2 May
0 wk
23 May
3 wk after
Busy lizzie
Impatiens walleriana
22 Mar – 19 Apr
12 Apr
8-12 wk
14 Jun
6 wk after
Creeping zinnia
Sanvitalia procumbens
3 – 17 Apr
16 Apr
6-8 wk
29 May
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
17 Apr – 1 May
4-6 wk
29 May
4 wk after
Chinese lantern
Physalis alkekengi
1 – 15 Mar
20 Apr
8-10 wk
10 May
15 Jun
1 wk after
Love in a mist
Nigella damascena
2 May
30 Jun
0 wk
6 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
22 Mar – 5 Apr
14 Apr
6-8 wk
17 May
26 May
2 wk after
30 Jun
8 wk after
Purple-top vervain
Verbena bonariensis
15 Feb – 15 Mar
20 Apr
8-12 wk
10 May
15 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
22 Feb – 22 Mar
21 Mar
8-12 wk
17 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
22 Feb – 22 Mar
31 Mar
8-12 wk
17 May
26 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
22 Mar – 5 Apr
14 Apr
6-8 wk
17 May
26 May
2 wk after
Corn poppy
Papaver rhoeas
2 May
15 Jul
0 wk
6 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
7 Feb – 7 Mar
10 May
8-12 wk
2 May
5 Jul
0 wk
18 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
20 Mar – 3 Apr
20 Apr
8-10 wk
29 May
15 Jun
4 wk after
Sweet pea
Lathyrus odoratus
7 – 28 Mar
31 May
5-8 wk
2 May
5 Jul
0 wk
Stock
Matthiola incana
7 – 21 Mar
3 Jun
6-8 wk
2 May
15 Jul
0 wk
23 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
7 – 21 Mar
4 May
6-8 wk
2 May
15 Jun
0 wk
23 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
5 – 19 Apr
23 Apr
4-6 wk
17 May
21 May
2 wk after
Garden pansy
Viola × wittrockiana
21 Feb – 7 Mar
20 May
8-10 wk
2 May
15 Jul
0 wk
18 May
5 Jul
2 wk after
Petunia
Petunia
Fleece
22 Feb – 22 Mar
10 Apr
8-12 wk
17 May
5 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
15 – 29 Mar
4 May
6-8 wk
10 May
15 Jun
1 wk after
20 Jun
7 wk after
Common zinnia
Zinnia elegans
Fleece
5 – 19 Apr
8 May
4-6 wk
17 May
5 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
12 – 26 Apr
15 May
3-5 wk
17 May
5 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
17 Apr – 1 May
28 Apr
4-6 wk
29 May
4 wk after
20 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
6 Mar – 3 Apr
30 Apr
8-12 wk
29 May
25 Jun
4 wk after
Bee balm
Monarda didyma
7 Feb – 7 Mar
20 Apr
8-12 wk
2 May
15 Jun
0 wk
6 Jun
5 wk after
Yarrow
Achillea millefolium
7 – 21 Mar
4 Apr
6-8 wk
2 May
16 May
0 wk
23 May
3 wk after
Safflower
Carthamus tinctorius
2 May
15 Jun
0 wk
6 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
7 – 21 Mar
24 May
6-8 wk
2 May
5 Jul
0 wk
14 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
21 Mar – 4 Apr
7 Jun
4-6 wk
2 May
5 Jul
0 wk
23 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
22 Feb – 8 Mar
12 Mar
10-12 wk
17 May
21 May
2 wk after
Sunflower
Helianthus annuus
1 – 8 May
8 Jun
3-4 wk
29 May
29 Jun
4 wk after
6 Jun
19 Jun
5 wk after
China aster
Callistephus chinensis
3 – 17 Apr
28 May
6-8 wk
29 May
9 Jul
4 wk after
20 Jun
29 Jun
7 wk after
Annual phlox
Phlox drummondii
22 Mar – 5 Apr
16 Apr
6-8 wk
17 May
28 May
2 wk after
20 Jun
7 wk after
Hollyhock
Alcea rosea
7 – 21 Mar
6-8 wk
2 May
0 wk
23 May
3 wk after
Alpine delphinium
Delphinium elatum
7 Feb – 7 Mar
20 Apr
8-12 wk
2 May
15 Jun
0 wk
6 Jun
5 wk after
African marigold
Tagetes erecta
3 – 17 Apr
16 Apr
6-8 wk
29 May
4 wk after
Black-eyed Susan
Rudbeckia hirta
15 – 29 Mar
18 May
6-8 wk
10 May
29 Jun
1 wk after
20 Jun
7 wk after
Wood sage
Salvia nemorosa
21 Feb – 7 Mar
10 Apr
8-10 wk
2 May
5 Jun
0 wk
6 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
8 Mar – 5 Apr
24 Apr
6-10 wk
17 May
5 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
2 May
15 Jul
0 wk
6 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
20 Mar – 3 Apr
27 Apr
8-10 wk
29 May
22 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
7 – 21 Mar
4 May
6-8 wk
2 May
15 Jun
0 wk
23 May
5 Jun
3 wk after