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Method
Rel. frost
Last spring frost (0°C) 19 May Frost 1 of 4 years · 20 years of data
Frost-free season 156 days 19 May – 22 Oct
Probability that frost is over

75% = Half of years are frost-free by this date. More about frost & season →

Custom date

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
31 Mar – 14 Apr
8 Jun
5-7 wk
19 May
13 Jul
0 wk
20 May
3 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
7 – 21 Apr
20 Jun
4-6 wk
19 May
18 Jul
0 wk
20 May
8 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
2 – 30 Mar
8-12 wk
25 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
31 Mar – 14 Apr
3 Jun
5-7 wk
19 May
8 Jul
0 wk
19 May
28 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
27 Apr – 4 May
21 Jun
3-4 wk
25 May
12 Jul
1 wk after
Florence Fennel
Foeniculum vulgare
16 – 23 May
31 May
4-5 wk
20 Jun
28 Jun
5 wk after
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
30 May – 6 Jun
3-4 wk
27 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
24 Feb – 24 Mar
20 Mar
8-12 wk
19 May
0 wk
1 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
20 May
4 Jun
0 wk
20 May
25 May
0 wk
Maize
Zea mays
Greenhouse
21 – 28 Apr
11 Jun
3-4 wk
19 May
2 Jul
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
23 – 30 Apr
27 Jun
3-4 wk
21 May
18 Jul
0 wk
1 Jun
8 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
19 May
28 Jun
0 wk
19 May
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
31 Mar – 14 Apr
3 Jun
5-7 wk
19 May
8 Jul
0 wk
19 May
28 Jun
0 wk
Potato
Solanum tuberosum
Fleece
8 – 22 Apr
27 May
4-6 wk
20 May
24 Jun
0 wk
20 May
14 Jun
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
31 Mar – 14 Apr
13 Jun
5-7 wk
19 May
18 Jul
0 wk
20 May
8 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
4 – 11 May
26 Jun
3-4 wk
1 Jun
17 Jul
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
23 – 30 Apr
3 May
3-4 wk
21 May
24 May
0 wk
1 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
7 – 21 Apr
15 Jun
4-6 wk
19 May
13 Jul
0 wk
Lettuce
Lactuca sativa
21 – 28 Apr
2 Jul
3-4 wk
19 May
23 Jul
0 wk
20 May
13 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
7 – 21 Apr
15 Jun
4-6 wk
19 May
13 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
21 Apr – 5 May
25 May
2-4 wk
19 May
8 Jun
0 wk
19 May
29 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
20 May
4 Jun
0 wk
20 May
25 May
0 wk
Spinach
Spinacia oleracea
21 – 28 Apr
17 Jul
3-4 wk
19 May
7 Aug
0 wk
16 May
28 Jul
0 wk
Sweet potato
Ipomoea batatas
13 – 27 Jun
4-6 wk
25 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
24 Mar – 7 Apr
21 May
6-8 wk
19 May
2 Jul
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
27 Apr – 11 May
28 Jun
2-4 wk
25 May
12 Jul
1 wk after
13 Jun
2 Jul
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
7 – 21 Apr
15 Jun
4-6 wk
19 May
13 Jul
0 wk
Garden pea
Pisum sativum
21 – 28 Apr
17 Jun
3-4 wk
19 May
8 Jul
0 wk
20 May
28 Jun
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Fleece
20 Apr – 4 May
4 Jun
4-6 wk
1 Jun
2 Jul
2 wk after
Lemon balm
Melissa officinalis
10 – 24 Mar
13 May
8-10 wk
19 May
8 Jul
0 wk
13 Jun
28 Jun
4 wk after
Dill
Anethum graveolens
20 May
18 Jul
0 wk
Wild chives
Allium schoenoprasum
Season too short
24 Mar – 7 Apr
27 May
6-8 wk
19 May
8 Jul
0 wk
10 May
28 Jun
1 wk before
Spearmint
Mentha spicata
24 Feb – 24 Mar
13 May
8-12 wk
19 May
8 Jul
0 wk
13 Jun
28 Jun
4 wk after
Coriander
Coriandrum sativum
19 May
7 Aug
0 wk
1 Jun
28 Jul
2 wk after
Garden sage
Salvia officinalis
12 – 26 Mar
28 Apr
8-10 wk
21 May
23 Jun
0 wk
Common thyme
Thymus vulgaris
10 – 24 Mar
3 May
8-10 wk
19 May
28 Jun
0 wk
Oregano
Origanum vulgare
24 Mar – 7 Apr
17 May
6-8 wk
19 May
28 Jun
0 wk
13 Jun
18 Jun
4 wk after
Parsley
Petroselinum crispum
24 Mar – 7 Apr
17 May
6-8 wk
19 May
28 Jun
0 wk
20 May
18 Jun
0 wk
Rosemary
Salvia rosmarinus
12 Feb – 12 Mar
30 Mar
10-14 wk
21 May
8 Jun
0 wk

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
Fleece
4 – 11 May
11 Jun
3-4 wk
1 Jun
2 Jul
2 wk after
Cornflower
Centaurea cyanus
19 May
8 Jul
0 wk
20 May
28 Jun
0 wk
Statice
Limonium sinuatum
23 Mar – 6 Apr
30 Apr
8-10 wk
1 Jun
25 Jun
2 wk after
Sweet William
Dianthus barbatus
24 Mar – 7 Apr
6-8 wk
19 May
0 wk
29 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
6 – 20 Apr
14 May
6-8 wk
1 Jun
25 Jun
2 wk after
25 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
4 – 18 Apr
17 May
6-8 wk
30 May
28 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
6 Apr – 4 May
31 May
4-8 wk
1 Jun
28 Jun
2 wk after
1 Jun
18 Jun
2 wk after
Foxglove
Digitalis purpurea
10 – 24 Mar
8-10 wk
19 May
0 wk
1 Jun
2 wk after
Busy lizzie
Impatiens walleriana
28 Mar – 25 Apr
22 Jun
8-12 wk
20 Jun
17 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
6 – 20 Apr
24 May
6-8 wk
1 Jun
5 Jul
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
20 Apr – 4 May
5 May
4-6 wk
1 Jun
2 Jun
2 wk after
Chinese lantern
Physalis alkekengi
12 – 26 Mar
13 Apr
8-10 wk
21 May
8 Jun
0 wk
Love in a mist
Nigella damascena
19 May
23 Jun
0 wk
20 May
13 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
30 Mar – 13 Apr
7 May
6-8 wk
25 May
18 Jun
1 wk after
8 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
26 Feb – 26 Mar
13 Apr
8-12 wk
21 May
8 Jun
0 wk
Cardoon
Cynara cardunculus
Fleece
2 – 30 Mar
14 Mar
8-12 wk
25 May
1 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
2 – 30 Mar
3 May
8-12 wk
25 May
28 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
30 Mar – 13 Apr
17 May
6-8 wk
25 May
28 Jun
1 wk after
Corn poppy
Papaver rhoeas
19 May
8 Jul
0 wk
20 May
28 Jun
0 wk
Snapdragon
Antirrhinum majus
24 Feb – 24 Mar
3 May
8-12 wk
19 May
28 Jun
0 wk
29 May
18 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
23 Mar – 6 Apr
13 May
8-10 wk
1 Jun
8 Jul
2 wk after
Sweet pea
Lathyrus odoratus
24 Mar – 14 Apr
24 May
5-8 wk
19 May
28 Jun
0 wk
Stock
Matthiola incana
24 Mar – 7 Apr
27 May
6-8 wk
19 May
8 Jul
0 wk
1 Jun
28 Jun
2 wk after
Wormwood
Artemisia absinthium
24 Mar – 7 Apr
27 Apr
6-8 wk
19 May
8 Jun
0 wk
1 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
13 – 27 Apr
26 May
4-6 wk
25 May
23 Jun
1 wk after
Garden pansy
Viola × wittrockiana
10 – 24 Mar
13 May
8-10 wk
19 May
8 Jul
0 wk
29 May
28 Jun
1 wk after
Petunia
Petunia
9 Mar – 6 Apr
30 Apr
8-12 wk
1 Jun
25 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
26 Mar – 9 Apr
27 Apr
6-8 wk
21 May
8 Jun
0 wk
1 Jul
6 wk after
Common zinnia
Zinnia elegans
20 Apr – 4 May
4 Jun
4-6 wk
1 Jun
2 Jul
2 wk after
Common morning glory
Ipomoea purpurea
Fleece
27 Apr – 11 May
11 Jun
3-5 wk
1 Jun
2 Jul
2 wk after
Garden cosmos
Cosmos bipinnatus
20 Apr – 4 May
31 May
4-6 wk
1 Jun
28 Jun
2 wk after
1 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
9 Mar – 6 Apr
2 Jun
8-12 wk
1 Jun
28 Jul
2 wk after
Bee balm
Monarda didyma
24 Feb – 24 Mar
13 Apr
8-12 wk
19 May
8 Jun
0 wk
13 Jun
4 wk after
Yarrow
Achillea millefolium
24 Mar – 7 Apr
28 Mar
6-8 wk
19 May
0 wk
1 Jun
2 wk after
Safflower
Carthamus tinctorius
19 May
8 Jun
0 wk
20 May
29 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
24 Mar – 7 Apr
17 May
6-8 wk
19 May
28 Jun
0 wk
3 May
18 Jun
2 wk before
Bishop's flower
Ammi majus
7 – 21 Apr
31 May
4-6 wk
19 May
28 Jun
0 wk
1 Jun
18 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
2 – 16 Mar
30 Mar
10-12 wk
25 May
8 Jun
1 wk after
Sunflower
Helianthus annuus
4 – 11 May
7 Jun
3-4 wk
1 Jun
28 Jun
2 wk after
13 Jun
18 Jun
4 wk after
China aster
Callistephus chinensis
6 – 20 Apr
27 May
6-8 wk
1 Jun
8 Jul
2 wk after
1 Jul
6 wk after
Annual phlox
Phlox drummondii
30 Mar – 13 Apr
24 May
6-8 wk
25 May
5 Jul
1 wk after
1 Jul
6 wk after
Hollyhock
Alcea rosea
24 Mar – 7 Apr
6-8 wk
19 May
0 wk
1 Jun
2 wk after
Alpine delphinium
Delphinium elatum
24 Feb – 24 Mar
13 Apr
8-12 wk
19 May
8 Jun
0 wk
13 Jun
4 wk after
African marigold
Tagetes erecta
6 – 20 Apr
24 May
6-8 wk
1 Jun
5 Jul
2 wk after
Black-eyed Susan
Rudbeckia hirta
26 Mar – 9 Apr
17 May
6-8 wk
21 May
28 Jun
0 wk
1 Jul
6 wk after
Wood sage
Salvia nemorosa
10 – 24 Mar
3 Apr
8-10 wk
19 May
29 May
0 wk
13 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
23 Mar – 20 Apr
21 May
6-10 wk
1 Jun
2 Jul
2 wk after
California goldenpoppy
Eschscholzia californica
19 May
8 Jul
0 wk
20 May
28 Jun
0 wk
Painted tongue
Salpiglossis sinuata
23 Mar – 6 Apr
3 May
8-10 wk
1 Jun
28 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
24 Mar – 7 Apr
27 Apr
6-8 wk
19 May
8 Jun
0 wk
19 May
29 May
0 wk