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Rel. frost
Last spring frost (0°C) 20 May Frost 1 of 10 years · 20 years of data
Frost-free season 171 days 20 May – 7 Nov
Probability that frost is over

90% = 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)
1 – 15 Apr
12 Jun
5-7 wk
20 May
17 Jul
0 wk
21 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
8 – 22 Apr
24 Jun
4-6 wk
20 May
22 Jul
0 wk
21 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Fleece
17 Mar – 14 Apr
12 Apr
8-12 wk
9 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Apr
7 Jun
5-7 wk
20 May
12 Jul
0 wk
20 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
26 May – 2 Jun
6 Jun
3-4 wk
23 Jun
27 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
19 – 26 May
4 Jun
4-5 wk
23 Jun
2 Jul
5 wk after
2 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
2 – 9 Jun
3-4 wk
30 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
25 Feb – 25 Mar
28 Mar
8-12 wk
20 May
23 May
0 wk
2 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
21 May
12 Jun
0 wk
21 May
2 Jun
0 wk
Maize
Zea mays
12 – 19 May
27 May
3-4 wk
9 Jun
17 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
28 Apr – 5 May
1 Jul
3-4 wk
26 May
22 Jul
1 wk after
2 Jun
12 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
20 May
2 Jul
0 wk
20 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Apr
7 Jun
5-7 wk
20 May
12 Jul
0 wk
20 May
2 Jul
0 wk
Potato
Solanum tuberosum
18 Apr – 2 May
3 Jun
4-6 wk
30 May
1 Jul
1 wk after
30 May
21 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Apr
17 Jun
5-7 wk
20 May
22 Jul
0 wk
21 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
26 May – 2 Jun
15 Jun
3-4 wk
23 Jun
6 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
28 Apr – 5 May
16 Jun
3-4 wk
26 May
7 Jul
1 wk after
2 Jun
27 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
8 – 22 Apr
19 Jun
4-6 wk
20 May
17 Jul
0 wk
Lettuce
Lactuca sativa
22 – 29 Apr
6 Jul
3-4 wk
20 May
27 Jul
0 wk
21 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
8 – 22 Apr
19 Jun
4-6 wk
20 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
22 Apr – 6 May
29 May
2-4 wk
20 May
12 Jun
0 wk
20 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
21 May
12 Jun
0 wk
21 May
2 Jun
0 wk
Spinach
Spinacia oleracea
22 – 29 Apr
21 Jul
3-4 wk
20 May
11 Aug
0 wk
17 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
14 – 28 Jun
4-6 wk
26 Jul
10 wk after
Garden tomato
Solanum lycopersicum
14 – 28 Apr
6 May
6-8 wk
9 Jun
17 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
12 – 26 May
17 Jun
2-4 wk
9 Jun
1 Jul
3 wk after
2 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
8 – 22 Apr
19 Jun
4-6 wk
20 May
17 Jul
0 wk
Garden pea
Pisum sativum
22 – 29 Apr
21 Jun
3-4 wk
20 May
12 Jul
0 wk
21 May
2 Jul
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
12 – 26 May
24 May
4-6 wk
23 Jun
5 wk after
Lemon balm
Melissa officinalis
11 – 25 Mar
17 May
8-10 wk
20 May
12 Jul
0 wk
14 Jun
2 Jul
4 wk after
Dill
Anethum graveolens
21 May
22 Jul
0 wk
Wild chives
Allium schoenoprasum
25 Mar – 8 Apr
31 May
6-8 wk
20 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Spearmint
Mentha spicata
25 Feb – 25 Mar
17 May
8-12 wk
20 May
12 Jul
0 wk
14 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
20 May
11 Aug
0 wk
2 Jun
1 Aug
2 wk after
Garden sage
Salvia officinalis
17 – 31 Mar
2 May
8-10 wk
26 May
27 Jun
1 wk after
Common thyme
Thymus vulgaris
11 – 25 Mar
7 May
8-10 wk
20 May
2 Jul
0 wk
Oregano
Origanum vulgare
25 Mar – 8 Apr
21 May
6-8 wk
20 May
2 Jul
0 wk
14 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
25 Mar – 8 Apr
21 May
6-8 wk
20 May
2 Jul
0 wk
21 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
17 Feb – 17 Mar
3 Apr
10-14 wk
26 May
12 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
26 May – 2 Jun
31 May
3-4 wk
23 Jun
5 wk after
Cornflower
Centaurea cyanus
20 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Statice
Limonium sinuatum
31 Mar – 14 Apr
7 May
8-10 wk
9 Jun
2 Jul
3 wk after
Sweet William
Dianthus barbatus
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
30 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
14 – 28 Apr
21 May
6-8 wk
9 Jun
2 Jul
3 wk after
26 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
9 – 23 Apr
21 May
6-8 wk
4 Jun
2 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
19 Apr – 17 May
4 Jun
4-8 wk
14 Jun
2 Jul
4 wk after
14 Jun
22 Jun
4 wk after
Foxglove
Digitalis purpurea
11 – 25 Mar
8-10 wk
20 May
0 wk
2 Jun
2 wk after
Busy lizzie
Impatiens walleriana
31 Mar – 28 Apr
27 Jun
8-12 wk
23 Jun
22 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
14 – 28 Apr
31 May
6-8 wk
9 Jun
12 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
28 Apr – 12 May
10 May
4-6 wk
9 Jun
3 wk after
Chinese lantern
Physalis alkekengi
17 – 31 Mar
17 Apr
8-10 wk
26 May
12 Jun
1 wk after
Love in a mist
Nigella damascena
20 May
27 Jun
0 wk
21 May
17 Jun
0 wk
Strawflower
Xerochrysum bracteatum
14 – 28 Apr
11 May
6-8 wk
9 Jun
22 Jun
3 wk after
26 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
3 – 31 Mar
17 Apr
8-12 wk
26 May
12 Jun
1 wk after
Cardoon
Cynara cardunculus
17 Mar – 14 Apr
18 Mar
8-12 wk
9 Jun
3 wk after
Regal-foxtail
Ptilotus nobilis
31 Mar – 28 Apr
16 Apr
8-12 wk
23 Jun
5 wk after
Globe amaranth
Gomphrena globosa
28 Apr – 12 May
30 Apr
6-8 wk
23 Jun
5 wk after
Corn poppy
Papaver rhoeas
20 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Snapdragon
Antirrhinum majus
25 Feb – 25 Mar
7 May
8-12 wk
20 May
2 Jul
0 wk
30 May
22 Jun
1 wk after
Flossflower
Ageratum houstonianum
14 – 28 Apr
17 May
8-10 wk
23 Jun
12 Jul
5 wk after
Sweet pea
Lathyrus odoratus
25 Mar – 15 Apr
28 May
5-8 wk
20 May
2 Jul
0 wk
Stock
Matthiola incana
25 Mar – 8 Apr
31 May
6-8 wk
20 May
12 Jul
0 wk
2 Jun
2 Jul
2 wk after
Wormwood
Artemisia absinthium
25 Mar – 8 Apr
1 May
6-8 wk
20 May
12 Jun
0 wk
2 Jun
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
12 – 26 May
4-6 wk
23 Jun
5 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Mar
17 May
8-10 wk
20 May
12 Jul
0 wk
30 May
2 Jul
1 wk after
Petunia
Petunia
17 Mar – 14 Apr
7 May
8-12 wk
9 Jun
2 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
31 Mar – 14 Apr
1 May
6-8 wk
26 May
12 Jun
1 wk after
2 Jul
6 wk after
Common zinnia
Zinnia elegans
28 Apr – 12 May
9 Jun
4-6 wk
9 Jun
7 Jul
3 wk after
Common morning glory
Ipomoea purpurea
19 May – 2 Jun
31 May
3-5 wk
23 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
28 Apr – 12 May
4 Jun
4-6 wk
9 Jun
2 Jul
3 wk after
2 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
12 Apr – 10 May
16 May
8-12 wk
5 Jul
11 Jul
7 wk after
Bee balm
Monarda didyma
25 Feb – 25 Mar
17 Apr
8-12 wk
20 May
12 Jun
0 wk
14 Jun
4 wk after
Yarrow
Achillea millefolium
25 Mar – 8 Apr
1 Apr
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Safflower
Carthamus tinctorius
20 May
12 Jun
0 wk
21 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
25 Mar – 8 Apr
21 May
6-8 wk
20 May
2 Jul
0 wk
4 May
22 Jun
2 wk before
Bishop's flower
Ammi majus
8 – 22 Apr
4 Jun
4-6 wk
20 May
2 Jul
0 wk
2 Jun
22 Jun
2 wk after
Drumsticks
Pycnosorus globosus
31 Mar – 14 Apr
10-12 wk
23 Jun
5 wk after
Sunflower
Helianthus annuus
12 – 19 May
11 Jun
3-4 wk
9 Jun
2 Jul
3 wk after
14 Jun
22 Jun
4 wk after
China aster
Callistephus chinensis
14 – 28 Apr
31 May
6-8 wk
9 Jun
12 Jul
3 wk after
2 Jul
2 Jul
6 wk after
Annual phlox
Phlox drummondii
5 – 19 Apr
31 May
6-8 wk
31 May
12 Jul
2 wk after
2 Jul
2 Jul
6 wk after
Hollyhock
Alcea rosea
25 Mar – 8 Apr
6-8 wk
20 May
0 wk
2 Jun
2 wk after
Alpine delphinium
Delphinium elatum
25 Feb – 25 Mar
17 Apr
8-12 wk
20 May
12 Jun
0 wk
14 Jun
4 wk after
African marigold
Tagetes erecta
14 – 28 Apr
31 May
6-8 wk
9 Jun
12 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
31 Mar – 14 Apr
21 May
6-8 wk
26 May
2 Jul
1 wk after
2 Jul
6 wk after
Wood sage
Salvia nemorosa
11 – 25 Mar
7 Apr
8-10 wk
20 May
2 Jun
0 wk
14 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
14 Apr – 12 May
10 May
6-10 wk
23 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
20 May
12 Jul
0 wk
21 May
2 Jul
0 wk
Painted tongue
Salpiglossis sinuata
31 Mar – 14 Apr
7 May
8-10 wk
9 Jun
2 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
25 Mar – 8 Apr
1 May
6-8 wk
20 May
12 Jun
0 wk
2 Jun
2 Jun
2 wk after