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Rel. frost
Last spring frost (0°C) 29 May Frost 1 of 10 years · 20 years of data
Frost-free season 141 days 29 May – 17 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)
10 – 24 Apr
14 Jun
5-7 wk
29 May
19 Jul
0 wk
2 Jun
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
17 Apr – 1 May
26 Jun
4-6 wk
29 May
24 Jul
0 wk
2 Jun
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
21 Mar – 18 Apr
8-12 wk
13 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
10 – 24 Apr
9 Jun
5-7 wk
29 May
14 Jul
0 wk
29 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
16 – 23 May
20 May
3-4 wk
13 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
6 – 13 Jun
6 Jun
4-5 wk
11 Jul
6 wk after
17 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
18 – 25 Jun
3-4 wk
16 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
6 Mar – 3 Apr
30 Mar
8-12 wk
29 May
0 wk
19 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
2 Jun
14 Jun
1 wk after
2 Jun
4 Jun
1 wk after
Maize
Zea mays
Greenhouse
2 – 9 May
10 May
3-4 wk
30 May
31 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
9 – 16 May
3 Jul
3-4 wk
6 Jun
24 Jul
1 wk after
19 Jun
14 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
29 May
4 Jul
0 wk
29 May
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
10 – 24 Apr
9 Jun
5-7 wk
29 May
14 Jul
0 wk
29 May
4 Jul
0 wk
Potato
Solanum tuberosum
3 – 17 May
6 Jun
4-6 wk
14 Jun
4 Jul
2 wk after
14 Jun
24 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
10 – 24 Apr
19 Jun
5-7 wk
29 May
24 Jul
0 wk
2 Jun
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
28 May – 4 Jun
3-4 wk
25 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
9 – 16 May
22 Jun
3-4 wk
6 Jun
13 Jul
1 wk after
19 Jun
3 Jul
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
17 Apr – 1 May
21 Jun
4-6 wk
29 May
19 Jul
0 wk
Lettuce
Lactuca sativa
1 – 8 May
8 Jul
3-4 wk
29 May
29 Jul
0 wk
2 Jun
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
17 Apr – 1 May
21 Jun
4-6 wk
29 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
1 – 15 May
31 May
2-4 wk
29 May
14 Jun
0 wk
29 May
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
2 Jun
14 Jun
1 wk after
2 Jun
4 Jun
1 wk after
Spinach
Spinacia oleracea
1 – 8 May
23 Jul
3-4 wk
29 May
13 Aug
0 wk
25 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
30 Jun – 14 Jul
4-6 wk
11 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
4 – 18 Apr
19 Apr
6-8 wk
30 May
31 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
16 – 30 May
27 May
2-4 wk
13 Jun
2 wk after
3 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
17 Apr – 1 May
21 Jun
4-6 wk
29 May
19 Jul
0 wk
Garden pea
Pisum sativum
1 – 8 May
23 Jun
3-4 wk
29 May
14 Jul
0 wk
2 Jun
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
Greenhouse
2 – 16 May
23 May
4-6 wk
13 Jun
20 Jun
2 wk after
Lemon balm
Melissa officinalis
20 Mar – 3 Apr
19 May
8-10 wk
29 May
14 Jul
0 wk
3 Jul
4 Jul
5 wk after
Dill
Anethum graveolens
2 Jun
24 Jul
1 wk after
Wild chives
Allium schoenoprasum
3 – 17 Apr
2 Jun
6-8 wk
29 May
14 Jul
0 wk
2 Jun
4 Jul
1 wk after
Spearmint
Mentha spicata
6 Mar – 3 Apr
19 May
8-12 wk
29 May
14 Jul
0 wk
3 Jul
4 Jul
5 wk after
Coriander
Coriandrum sativum
29 May
13 Aug
0 wk
19 Jun
3 Aug
3 wk after
Garden sage
Salvia officinalis
28 Mar – 11 Apr
4 May
8-10 wk
6 Jun
29 Jun
1 wk after
Common thyme
Thymus vulgaris
20 Mar – 3 Apr
9 May
8-10 wk
29 May
4 Jul
0 wk
Oregano
Origanum vulgare
3 – 17 Apr
23 May
6-8 wk
29 May
4 Jul
0 wk
3 Jul
5 wk after
Parsley
Petroselinum crispum
3 – 17 Apr
23 May
6-8 wk
29 May
4 Jul
0 wk
2 Jun
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
28 Feb – 28 Mar
5 Apr
10-14 wk
6 Jun
14 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
16 – 23 May
30 May
3-4 wk
13 Jun
20 Jun
2 wk after
Cornflower
Centaurea cyanus
29 May
14 Jul
0 wk
2 Jun
4 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
4 – 18 Apr
23 Apr
8-10 wk
13 Jun
18 Jun
2 wk after
Sweet William
Dianthus barbatus
3 – 17 Apr
6-8 wk
29 May
0 wk
14 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
18 Apr – 2 May
7 May
6-8 wk
13 Jun
18 Jun
2 wk after
27 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
22 Apr – 6 May
29 Apr
6-8 wk
17 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
8 May – 5 Jun
13 May
4-8 wk
3 Jul
5 wk after
3 Jul
5 wk after
Foxglove
Digitalis purpurea
20 Mar – 3 Apr
8-10 wk
29 May
0 wk
19 Jun
3 wk after
Busy lizzie
Impatiens walleriana
18 Apr – 16 May
21 May
8-12 wk
11 Jul
16 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
30 Apr – 14 May
6-8 wk
25 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
14 – 28 May
4-6 wk
25 Jun
4 wk after
Chinese lantern
Physalis alkekengi
28 Mar – 11 Apr
19 Apr
8-10 wk
6 Jun
14 Jun
1 wk after
Love in a mist
Nigella damascena
29 May
29 Jun
0 wk
2 Jun
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
18 Apr – 2 May
27 Apr
6-8 wk
13 Jun
2 wk after
27 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
14 Mar – 11 Apr
19 Apr
8-12 wk
6 Jun
14 Jun
1 wk after
Cardoon
Cynara cardunculus
2 – 30 Apr
8-12 wk
25 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
21 Mar – 18 Apr
15 Apr
8-12 wk
13 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
18 Apr – 2 May
29 Apr
6-8 wk
13 Jun
2 wk after
Corn poppy
Papaver rhoeas
29 May
14 Jul
0 wk
2 Jun
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
6 Mar – 3 Apr
9 May
8-12 wk
29 May
4 Jul
0 wk
14 Jun
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
2 – 16 May
8-10 wk
11 Jul
6 wk after
Sweet pea
Lathyrus odoratus
3 – 24 Apr
30 May
5-8 wk
29 May
4 Jul
0 wk
Stock
Matthiola incana
3 – 17 Apr
2 Jun
6-8 wk
29 May
14 Jul
0 wk
19 Jun
4 Jul
3 wk after
Wormwood
Artemisia absinthium
3 – 17 Apr
3 May
6-8 wk
29 May
14 Jun
0 wk
19 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
2 – 16 May
8 May
4-6 wk
13 Jun
2 wk after
Garden pansy
Viola × wittrockiana
20 Mar – 3 Apr
19 May
8-10 wk
29 May
14 Jul
0 wk
14 Jun
4 Jul
2 wk after
Petunia
Petunia
Fleece
21 Mar – 18 Apr
23 Apr
8-12 wk
13 Jun
18 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
11 – 25 Apr
3 May
6-8 wk
6 Jun
14 Jun
1 wk after
17 Jul
7 wk after
Common zinnia
Zinnia elegans
Fleece
2 – 16 May
23 May
4-6 wk
13 Jun
20 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
9 – 23 May
30 May
3-5 wk
13 Jun
20 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
14 – 28 May
4-6 wk
25 Jun
4 wk after
17 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
18 Apr – 16 May
25 Apr
8-12 wk
11 Jul
6 wk after
Bee balm
Monarda didyma
6 Mar – 3 Apr
19 Apr
8-12 wk
29 May
14 Jun
0 wk
3 Jul
5 wk after
Yarrow
Achillea millefolium
3 – 17 Apr
3 Apr
6-8 wk
29 May
0 wk
19 Jun
3 wk after
Safflower
Carthamus tinctorius
29 May
14 Jun
0 wk
2 Jun
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
3 – 17 Apr
23 May
6-8 wk
29 May
4 Jul
0 wk
11 May
24 Jun
3 wk before
Bishop's flower
Ammi majus
17 Apr – 1 May
6 Jun
4-6 wk
29 May
4 Jul
0 wk
19 Jun
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
21 Mar – 4 Apr
21 Mar
10-12 wk
13 Jun
2 wk after
Sunflower
Helianthus annuus
28 May – 4 Jun
13 Jun
3-4 wk
25 Jun
4 Jul
4 wk after
3 Jul
5 wk after
China aster
Callistephus chinensis
30 Apr – 14 May
2 Jun
6-8 wk
25 Jun
14 Jul
4 wk after
17 Jul
7 wk after
Annual phlox
Phlox drummondii
18 Apr – 2 May
24 Apr
6-8 wk
13 Jun
2 wk after
17 Jul
7 wk after
Hollyhock
Alcea rosea
3 – 17 Apr
6-8 wk
29 May
0 wk
19 Jun
3 wk after
Alpine delphinium
Delphinium elatum
6 Mar – 3 Apr
19 Apr
8-12 wk
29 May
14 Jun
0 wk
3 Jul
5 wk after
African marigold
Tagetes erecta
30 Apr – 14 May
6-8 wk
25 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
11 – 25 Apr
23 May
6-8 wk
6 Jun
4 Jul
1 wk after
17 Jul
7 wk after
Wood sage
Salvia nemorosa
20 Mar – 3 Apr
9 Apr
8-10 wk
29 May
4 Jun
0 wk
3 Jul
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
4 Apr – 2 May
9 May
6-10 wk
13 Jun
20 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
29 May
14 Jul
0 wk
2 Jun
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
16 – 30 Apr
9 May
8-10 wk
25 Jun
4 Jul
4 wk after
Water forget-me-not
Myosotis scorpioides
3 – 17 Apr
3 May
6-8 wk
29 May
14 Jun
0 wk
19 Jun
3 wk after