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Rel. frost
Last spring frost (0°C) 7 May Frost 3 of 4 years · 20 years of data
Frost-free season 143 days 7 May – 27 Sep
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)
19 Mar – 2 Apr
16 Jun
5-7 wk
7 May
21 Jul
0 wk
30 Apr
11 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
26 Mar – 9 Apr
28 Jun
4-6 wk
7 May
26 Jul
0 wk
30 Apr
16 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
23 Feb – 23 Mar
8 Apr
8-12 wk
18 May
3 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
19 Mar – 2 Apr
11 Jun
5-7 wk
7 May
16 Jul
0 wk
25 Apr
6 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
28 Apr – 5 May
2 Jun
3-4 wk
26 May
23 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
8 – 15 May
27 May
4-5 wk
12 Jun
24 Jun
5 wk after
12 Jun
14 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
22 – 29 May
3-4 wk
19 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
12 Feb – 12 Mar
26 Mar
8-12 wk
7 May
21 May
0 wk
17 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
30 Apr
10 Jun
1 wk before
30 Apr
31 May
1 wk before
Maize
Zea mays
Fleece
20 – 27 Apr
23 May
3-4 wk
18 May
13 Jun
2 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
15 – 22 Apr
5 Jul
3-4 wk
13 May
26 Jul
1 wk after
17 May
16 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
7 May
6 Jul
0 wk
25 Apr
26 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
19 Mar – 2 Apr
11 Jun
5-7 wk
7 May
16 Jul
0 wk
25 Apr
6 Jul
2 wk before
Potato
Solanum tuberosum
31 Mar – 14 Apr
25 May
4-6 wk
12 May
22 Jun
1 wk after
12 May
12 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
19 Mar – 2 Apr
21 Jun
5-7 wk
7 May
26 Jul
0 wk
30 Apr
16 Jul
1 wk before
Pumpkin
Cucurbita pepo
15 – 22 May
7 Jun
3-4 wk
12 Jun
28 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
15 – 22 Apr
31 May
3-4 wk
13 May
21 Jun
1 wk after
17 May
11 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
26 Mar – 9 Apr
23 Jun
4-6 wk
7 May
21 Jul
0 wk
Lettuce
Lactuca sativa
9 – 16 Apr
10 Jul
3-4 wk
7 May
31 Jul
0 wk
30 Apr
21 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
26 Mar – 9 Apr
23 Jun
4-6 wk
7 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
28 Mar – 11 Apr
2 Jun
2-4 wk
25 Apr
16 Jun
2 wk before
25 Apr
6 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
30 Apr
10 Jun
1 wk before
30 Apr
31 May
1 wk before
Spinach
Spinacia oleracea
9 – 16 Apr
25 Jul
3-4 wk
7 May
15 Aug
0 wk
19 Apr
5 Aug
3 wk before
Sweet potato
Ipomoea batatas
3 – 17 Jun
4-6 wk
15 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
23 Mar – 6 Apr
2 May
6-8 wk
18 May
13 Jun
2 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
28 Apr – 12 May
9 Jun
2-4 wk
26 May
23 Jun
3 wk after
12 Jun
13 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
26 Mar – 9 Apr
23 Jun
4-6 wk
7 May
21 Jul
0 wk
Garden pea
Pisum sativum
9 – 16 Apr
25 Jun
3-4 wk
7 May
16 Jul
0 wk
30 Apr
6 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
1 – 15 May
16 May
4-6 wk
12 Jun
13 Jun
5 wk after
Lemon balm
Melissa officinalis
26 Feb – 12 Mar
21 May
8-10 wk
7 May
16 Jul
0 wk
28 May
6 Jul
3 wk after
Dill
Anethum graveolens
30 Apr
26 Jul
1 wk before
Wild chives
Allium schoenoprasum
12 – 26 Mar
4 Jun
6-8 wk
7 May
16 Jul
0 wk
30 Apr
6 Jul
1 wk before
Spearmint
Mentha spicata
12 Feb – 12 Mar
21 May
8-12 wk
7 May
16 Jul
0 wk
28 May
6 Jul
3 wk after
Coriander
Coriandrum sativum
7 May
15 Aug
0 wk
17 May
5 Aug
1 wk after
Garden sage
Salvia officinalis
4 – 18 Mar
6 May
8-10 wk
13 May
1 Jul
1 wk after
Common thyme
Thymus vulgaris
26 Feb – 12 Mar
11 May
8-10 wk
7 May
6 Jul
0 wk
Oregano
Origanum vulgare
12 – 26 Mar
25 May
6-8 wk
7 May
6 Jul
0 wk
28 May
26 Jun
3 wk after
Parsley
Petroselinum crispum
12 – 26 Mar
25 May
6-8 wk
7 May
6 Jul
0 wk
30 Apr
26 Jun
1 wk before
Rosemary
Salvia rosmarinus
4 Feb – 4 Mar
30 Mar
10-14 wk
13 May
8 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
15 – 22 May
23 May
3-4 wk
12 Jun
13 Jun
5 wk after
Cornflower
Centaurea cyanus
7 May
16 Jul
0 wk
30 Apr
6 Jul
1 wk before
Statice
Limonium sinuatum
17 – 31 Mar
27 Apr
8-10 wk
26 May
22 Jun
3 wk after
Sweet William
Dianthus barbatus
12 – 26 Mar
6-8 wk
7 May
0 wk
12 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
31 Mar – 14 Apr
11 May
6-8 wk
26 May
22 Jun
3 wk after
15 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
26 Mar – 9 Apr
13 May
6-8 wk
21 May
24 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
2 – 30 Apr
27 May
4-8 wk
28 May
24 Jun
3 wk after
28 May
14 Jun
3 wk after
Foxglove
Digitalis purpurea
26 Feb – 12 Mar
8-10 wk
7 May
0 wk
17 May
1 wk after
Busy lizzie
Impatiens walleriana
20 Mar – 17 Apr
18 Jun
8-12 wk
12 Jun
13 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
31 Mar – 14 Apr
21 May
6-8 wk
26 May
2 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
14 – 28 Apr
1 May
4-6 wk
26 May
29 May
3 wk after
Chinese lantern
Physalis alkekengi
4 – 18 Mar
21 Apr
8-10 wk
13 May
16 Jun
1 wk after
Love in a mist
Nigella damascena
7 May
1 Jul
0 wk
30 Apr
21 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
31 Mar – 14 Apr
1 May
6-8 wk
26 May
12 Jun
3 wk after
15 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
18 Feb – 18 Mar
21 Apr
8-12 wk
13 May
16 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
23 Feb – 23 Mar
22 Mar
8-12 wk
18 May
2 wk after
Regal-foxtail
Ptilotus nobilis
20 Mar – 17 Apr
8 Apr
8-12 wk
12 Jun
5 wk after
Globe amaranth
Gomphrena globosa
17 Apr – 1 May
22 Apr
6-8 wk
12 Jun
5 wk after
Corn poppy
Papaver rhoeas
7 May
16 Jul
0 wk
30 Apr
6 Jul
1 wk before
Snapdragon
Antirrhinum majus
12 Feb – 12 Mar
11 May
8-12 wk
7 May
6 Jul
0 wk
12 May
26 Jun
1 wk after
Flossflower
Ageratum houstonianum
3 – 17 Apr
7 May
8-10 wk
12 Jun
2 Jul
5 wk after
Sweet pea
Lathyrus odoratus
12 Mar – 2 Apr
1 Jun
5-8 wk
7 May
6 Jul
0 wk
Stock
Matthiola incana
12 – 26 Mar
4 Jun
6-8 wk
7 May
16 Jul
0 wk
17 May
6 Jul
1 wk after
Wormwood
Artemisia absinthium
12 – 26 Mar
5 May
6-8 wk
7 May
16 Jun
0 wk
17 May
6 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
14 – 28 Apr
16 May
4-6 wk
26 May
13 Jun
3 wk after
Garden pansy
Viola × wittrockiana
26 Feb – 12 Mar
21 May
8-10 wk
7 May
16 Jul
0 wk
12 May
6 Jul
1 wk after
Petunia
Petunia
3 – 31 Mar
27 Apr
8-12 wk
26 May
22 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
18 Mar – 1 Apr
5 May
6-8 wk
13 May
16 Jun
1 wk after
12 Jun
5 wk after
Common zinnia
Zinnia elegans
14 – 28 Apr
31 May
4-6 wk
26 May
28 Jun
3 wk after
Common morning glory
Ipomoea purpurea
8 – 22 May
23 May
3-5 wk
12 Jun
13 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
14 – 28 Apr
27 May
4-6 wk
26 May
24 Jun
3 wk after
12 Jun
14 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
1 – 29 Apr
8 May
8-12 wk
24 Jun
3 Jul
7 wk after
Bee balm
Monarda didyma
12 Feb – 12 Mar
21 Apr
8-12 wk
7 May
16 Jun
0 wk
28 May
6 Jun
3 wk after
Yarrow
Achillea millefolium
12 – 26 Mar
5 Apr
6-8 wk
7 May
17 May
0 wk
17 May
1 wk after
Safflower
Carthamus tinctorius
7 May
16 Jun
0 wk
30 Apr
6 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
12 – 26 Mar
25 May
6-8 wk
7 May
6 Jul
0 wk
29 Mar
26 Jun
6 wk before
Bishop's flower
Ammi majus
26 Mar – 9 Apr
8 Jun
4-6 wk
7 May
6 Jul
0 wk
17 May
26 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Fleece
3 – 17 Mar
26 Mar
10-12 wk
26 May
4 Jun
3 wk after
Sunflower
Helianthus annuus
28 Apr – 5 May
7 Jun
3-4 wk
26 May
28 Jun
3 wk after
28 May
18 Jun
3 wk after
China aster
Callistephus chinensis
31 Mar – 14 Apr
27 May
6-8 wk
26 May
8 Jul
3 wk after
12 Jun
28 Jun
5 wk after
Annual phlox
Phlox drummondii
23 Mar – 6 Apr
21 May
6-8 wk
18 May
2 Jul
2 wk after
12 Jun
22 Jun
5 wk after
Hollyhock
Alcea rosea
12 – 26 Mar
6-8 wk
7 May
0 wk
17 May
1 wk after
Alpine delphinium
Delphinium elatum
12 Feb – 12 Mar
21 Apr
8-12 wk
7 May
16 Jun
0 wk
28 May
6 Jun
3 wk after
African marigold
Tagetes erecta
31 Mar – 14 Apr
21 May
6-8 wk
26 May
2 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
18 Mar – 1 Apr
17 May
6-8 wk
13 May
28 Jun
1 wk after
12 Jun
18 Jun
5 wk after
Wood sage
Salvia nemorosa
26 Feb – 12 Mar
11 Apr
8-10 wk
7 May
6 Jun
0 wk
28 May
3 wk after
Black-eyed susan vine
Thunbergia alata
3 Apr – 1 May
2 May
6-10 wk
12 Jun
13 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
7 May
16 Jul
0 wk
30 Apr
6 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
17 – 31 Mar
29 Apr
8-10 wk
26 May
24 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
12 – 26 Mar
5 May
6-8 wk
7 May
16 Jun
0 wk
17 May
6 Jun
1 wk after