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Rel. frost
Last spring frost (0°C) 24 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 153 days 24 Apr – 24 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)
4 – 18 Apr
19 Jun
5-7 wk
23 May
24 Jul
4 wk after
17 Apr
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
27 Mar – 10 Apr
1 Jul
4-6 wk
8 May
29 Jul
2 wk after
17 Apr
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
6 Mar – 3 Apr
8-12 wk
29 May
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
9 – 23 Feb
14 Jun
5-7 wk
30 Mar
19 Jul
4 wk before
12 Apr
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
1 – 8 May
5 May
3-4 wk
29 May
5 wk after
Florence Fennel
Foeniculum vulgare
14 – 21 May
26 May
4-5 wk
18 Jun
23 Jun
8 wk after
30 May
13 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
23 – 30 May
3-4 wk
20 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
30 Jan – 27 Feb
1 Apr
8-12 wk
24 Apr
27 May
Vid frost
4 May
17 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
17 Apr
16 Jun
1 wk before
17 Apr
6 Jun
1 wk before
Maize
Zea mays
Greenhouse
18 – 25 Apr
25 Apr
3-4 wk
16 May
16 May
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
25 Apr – 2 May
3 Jul
3-4 wk
23 May
24 Jul
4 wk after
4 May
14 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
12 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
9 – 23 Feb
14 Jun
5-7 wk
30 Mar
19 Jul
4 wk before
12 Apr
9 Jul
2 wk before
Potato
Solanum tuberosum
18 Mar – 1 Apr
4 Jun
4-6 wk
29 Apr
2 Jul
1 wk after
29 Apr
22 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
9 – 23 Feb
24 Jun
5-7 wk
30 Mar
29 Jul
4 wk before
17 Apr
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
13 – 20 May
3-4 wk
10 Jun
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
25 Apr – 2 May
11 Jun
3-4 wk
23 May
2 Jul
4 wk after
4 May
22 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
27 Mar – 10 Apr
26 Jun
4-6 wk
8 May
24 Jul
2 wk after
Lettuce
Lactuca sativa
20 – 27 Mar
13 Jul
3-4 wk
17 Apr
3 Aug
1 wk before
17 Apr
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Mar
26 Jun
4-6 wk
17 Apr
24 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
15 – 29 Mar
5 Jun
2-4 wk
12 Apr
19 Jun
2 wk before
12 Apr
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
17 Apr
16 Jun
1 wk before
17 Apr
6 Jun
1 wk before
Spinach
Spinacia oleracea
12 – 19 Mar
28 Jul
3-4 wk
9 Apr
18 Aug
2 wk before
6 Apr
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
21 May – 4 Jun
4-6 wk
2 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
21 Mar – 4 Apr
4 Apr
6-8 wk
16 May
16 May
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
1 – 15 May
12 May
2-4 wk
29 May
5 wk after
15 May
16 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
27 Mar – 10 Apr
26 Jun
4-6 wk
8 May
24 Jul
2 wk after
Garden pea
Pisum sativum
12 – 19 Mar
28 Jun
3-4 wk
9 Apr
19 Jul
2 wk before
17 Apr
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
17 Apr – 1 May
6 May
4-6 wk
29 May
3 Jun
5 wk after
Lemon balm
Melissa officinalis
13 – 27 Feb
24 May
8-10 wk
24 Apr
19 Jul
Vid frost
15 May
9 Jul
3 wk after
Dill
Anethum graveolens
17 Apr
24 Jul
1 wk before
Wild chives
Allium schoenoprasum
2 – 16 Feb
7 Jun
6-8 wk
30 Mar
19 Jul
4 wk before
17 Apr
9 Jul
1 wk before
Spearmint
Mentha spicata
15 Jan – 12 Feb
24 May
8-12 wk
9 Apr
19 Jul
2 wk before
15 May
9 Jul
3 wk after
Coriander
Coriandrum sativum
4 May
3 Aug
1 wk after
Garden sage
Salvia officinalis
14 – 28 Mar
9 May
8-10 wk
23 May
4 Jul
4 wk after
Common thyme
Thymus vulgaris
27 Feb – 13 Mar
14 May
8-10 wk
8 May
9 Jul
2 wk after
Oregano
Origanum vulgare
5 – 19 Mar
28 May
6-8 wk
30 Apr
9 Jul
1 wk after
15 May
29 Jun
3 wk after
Parsley
Petroselinum crispum
12 – 26 Feb
28 May
6-8 wk
9 Apr
9 Jul
2 wk before
17 Apr
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
14 Feb – 14 Mar
3 Apr
10-14 wk
23 May
12 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
1 – 8 May
13 May
3-4 wk
29 May
3 Jun
5 wk after
Cornflower
Centaurea cyanus
9 Apr
19 Jul
2 wk before
17 Apr
9 Jul
1 wk before
Statice
Limonium sinuatum
Fleece
20 Mar – 3 Apr
12 Apr
8-10 wk
29 May
7 Jun
5 wk after
Sweet William
Dianthus barbatus
12 – 26 Feb
6-8 wk
9 Apr
2 wk before
29 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
3 – 17 Apr
26 Apr
6-8 wk
29 May
7 Jun
5 wk after
9 Jun
7 wk after
Pinnate dahlia
Dahlia × pinnata
9 – 23 Apr
12 Apr
6-8 wk
4 Jun
6 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
20 Mar – 17 Apr
26 Apr
4-8 wk
15 May
24 May
3 wk after
15 May
3 wk after
Foxglove
Digitalis purpurea
29 Jan – 12 Feb
8-10 wk
9 Apr
2 wk before
4 May
1 wk after
Busy lizzie
Impatiens walleriana
26 Mar – 23 Apr
6 May
8-12 wk
18 Jun
1 Jul
8 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
3 – 17 Apr
6 May
6-8 wk
29 May
17 Jun
5 wk after
Hyacinth bean
Dolichos lablab
Season too short
29 Apr – 13 May
4-6 wk
10 Jun
7 wk after
Chinese lantern
Physalis alkekengi
14 – 28 Mar
19 Apr
8-10 wk
23 May
14 Jun
4 wk after
Love in a mist
Nigella damascena
17 Apr
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
Fleece
3 – 17 Apr
16 Apr
6-8 wk
29 May
5 wk after
9 Jun
7 wk after
Purple-top vervain
Verbena bonariensis
28 Feb – 28 Mar
19 Apr
8-12 wk
23 May
14 Jun
4 wk after
Cardoon
Cynara cardunculus
Fleece
6 Mar – 3 Apr
25 Mar
8-12 wk
29 May
5 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
6 Mar – 3 Apr
29 Mar
8-12 wk
29 May
5 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
3 – 17 Apr
12 Apr
6-8 wk
29 May
5 wk after
Corn poppy
Papaver rhoeas
17 Apr
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
23 Jan – 20 Feb
14 May
8-12 wk
17 Apr
9 Jul
1 wk before
29 Apr
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
1 – 15 Apr
22 Apr
8-10 wk
10 Jun
17 Jun
7 wk after
Sweet pea
Lathyrus odoratus
12 Feb – 5 Mar
4 Jun
5-8 wk
9 Apr
9 Jul
2 wk before
Stock
Matthiola incana
20 Feb – 6 Mar
7 Jun
6-8 wk
17 Apr
19 Jul
1 wk before
4 May
9 Jul
1 wk after
Wormwood
Artemisia absinthium
12 – 26 Feb
8 May
6-8 wk
9 Apr
19 Jun
2 wk before
4 May
9 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
17 Apr – 1 May
21 Apr
4-6 wk
29 May
5 wk after
Garden pansy
Viola × wittrockiana
19 Jan – 2 Feb
24 May
8-10 wk
30 Mar
19 Jul
4 wk before
29 Apr
9 Jul
1 wk after
Petunia
Petunia
Fleece
6 Mar – 3 Apr
12 Apr
8-12 wk
29 May
7 Jun
5 wk after
Sweet Scabious
Scabiosa atropurpurea
28 Mar – 11 Apr
3 May
6-8 wk
23 May
14 Jun
4 wk after
30 May
4 Jun
5 wk after
Common zinnia
Zinnia elegans
Fleece
17 Apr – 1 May
6 May
4-6 wk
29 May
3 Jun
5 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
24 Apr – 8 May
13 May
3-5 wk
29 May
3 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
17 Apr – 1 May
15 May
4-6 wk
29 May
12 Jun
5 wk after
15 May
2 Jun
3 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
26 Mar – 23 Apr
10 Apr
8-12 wk
18 Jun
8 wk after
Bee balm
Monarda didyma
30 Jan – 27 Feb
24 Apr
8-12 wk
24 Apr
19 Jun
Vid frost
15 May
9 Jun
3 wk after
Yarrow
Achillea millefolium
12 – 26 Feb
8 Apr
6-8 wk
9 Apr
20 May
2 wk before
4 May
10 May
1 wk after
Safflower
Carthamus tinctorius
9 Apr
19 Jun
2 wk before
17 Apr
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
2 – 16 Feb
28 May
6-8 wk
30 Mar
9 Jul
4 wk before
12 Apr
29 Jun
2 wk before
Bishop's flower
Ammi majus
23 Mar – 6 Apr
11 Jun
4-6 wk
4 May
9 Jul
1 wk after
4 May
29 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
6 – 20 Mar
14 Mar
10-12 wk
29 May
5 wk after
Sunflower
Helianthus annuus
13 – 20 May
11 Jun
3-4 wk
10 Jun
2 Jul
7 wk after
15 May
22 Jun
3 wk after
China aster
Callistephus chinensis
15 – 29 Apr
31 May
6-8 wk
10 Jun
12 Jul
7 wk after
30 May
2 Jul
5 wk after
Annual phlox
Phlox drummondii
3 – 17 Apr
13 Apr
6-8 wk
29 May
5 wk after
30 May
5 wk after
Hollyhock
Alcea rosea
12 – 26 Feb
6-8 wk
9 Apr
2 wk before
4 May
1 wk after
Alpine delphinium
Delphinium elatum
13 Feb – 13 Mar
24 Apr
8-12 wk
8 May
19 Jun
2 wk after
15 May
9 Jun
3 wk after
African marigold
Tagetes erecta
Fleece
3 – 17 Apr
6 May
6-8 wk
29 May
17 Jun
5 wk after
Black-eyed Susan
Rudbeckia hirta
28 Mar – 11 Apr
21 May
6-8 wk
23 May
2 Jul
4 wk after
30 May
22 Jun
5 wk after
Wood sage
Salvia nemorosa
19 Feb – 5 Mar
14 Apr
8-10 wk
30 Apr
9 Jun
1 wk after
15 May
30 May
3 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
20 Mar – 17 Apr
22 Apr
6-10 wk
29 May
3 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
17 Apr
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
1 – 15 Apr
28 Apr
8-10 wk
10 Jun
23 Jun
7 wk after
Water forget-me-not
Myosotis scorpioides
12 – 26 Feb
8 May
6-8 wk
9 Apr
19 Jun
2 wk before
4 May
9 Jun
1 wk after