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