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Method
Rel. frost
Last spring frost (0°C) 5 May Frost 3 of 4 years · 20 years of data
Frost-free season 150 days 5 May – 2 Oct
Probability that frost is over

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