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