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Rel. frost
Last spring frost (0°C) 3 May Frost 9 of 10 years · 20 years of data
Frost-free season 144 days 3 May – 24 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)
15 – 29 Mar
15 Jun
5-7 wk
3 May
20 Jul
0 wk
7 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
22 Mar – 5 Apr
27 Jun
4-6 wk
3 May
25 Jul
0 wk
7 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
23 Feb – 23 Mar
8-12 wk
18 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
15 – 29 Mar
10 Jun
5-7 wk
3 May
15 Jul
0 wk
3 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
20 – 27 Apr
3-4 wk
18 May
2 wk after
Florence Fennel
Foeniculum vulgare
11 – 18 May
24 May
4-5 wk
15 Jun
21 Jun
6 wk after
21 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
23 – 30 May
3-4 wk
20 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
8 Feb – 8 Mar
22 Mar
8-12 wk
3 May
17 May
0 wk
24 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
7 May
6 Jun
1 wk after
7 May
27 May
1 wk after
Maize
Zea mays
Season too short
6 – 13 Apr
3-4 wk
4 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
13 – 20 Apr
2 Jul
3-4 wk
11 May
23 Jul
1 wk after
24 May
13 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
3 May
5 Jul
0 wk
3 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
15 – 29 Mar
10 Jun
5-7 wk
3 May
15 Jul
0 wk
3 May
5 Jul
0 wk
Potato
Solanum tuberosum
7 – 21 Apr
20 May
4-6 wk
19 May
17 Jun
2 wk after
19 May
7 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
15 – 29 Mar
20 Jun
5-7 wk
3 May
25 Jul
0 wk
7 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
20 – 27 Apr
28 May
3-4 wk
18 May
18 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
13 – 20 Apr
5 Jun
3-4 wk
11 May
26 Jun
1 wk after
24 May
16 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
22 Mar – 5 Apr
22 Jun
4-6 wk
3 May
20 Jul
0 wk
Lettuce
Lactuca sativa
5 – 12 Apr
9 Jul
3-4 wk
3 May
30 Jul
0 wk
7 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
22 Mar – 5 Apr
22 Jun
4-6 wk
3 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Apr
31 May
2-4 wk
3 May
14 Jun
0 wk
3 May
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
7 May
6 Jun
1 wk after
7 May
27 May
1 wk after
Spinach
Spinacia oleracea
5 – 12 Apr
24 Jul
3-4 wk
3 May
14 Aug
0 wk
29 Apr
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
4 – 18 Jun
4-6 wk
16 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
9 – 23 Mar
6-8 wk
4 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
6 – 20 Apr
30 May
2-4 wk
4 May
13 Jun
0 wk
24 May
3 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
22 Mar – 5 Apr
22 Jun
4-6 wk
3 May
20 Jul
0 wk
Garden pea
Pisum sativum
5 – 12 Apr
24 Jun
3-4 wk
3 May
15 Jul
0 wk
7 May
5 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
6 – 20 Apr
6 May
4-6 wk
18 May
3 Jun
2 wk after
Lemon balm
Melissa officinalis
22 Feb – 8 Mar
20 May
8-10 wk
3 May
15 Jul
0 wk
7 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
7 May
23 Jul
1 wk after
Wild chives
Allium schoenoprasum
8 – 22 Mar
3 Jun
6-8 wk
3 May
15 Jul
0 wk
7 May
5 Jul
1 wk after
Spearmint
Mentha spicata
8 Feb – 8 Mar
20 May
8-12 wk
3 May
15 Jul
0 wk
7 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
3 May
12 Aug
0 wk
24 May
2 Aug
3 wk after
Garden sage
Salvia officinalis
2 – 16 Mar
5 May
8-10 wk
11 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
22 Feb – 8 Mar
10 May
8-10 wk
3 May
5 Jul
0 wk
Oregano
Origanum vulgare
8 – 22 Mar
24 May
6-8 wk
3 May
5 Jul
0 wk
7 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
8 – 22 Mar
24 May
6-8 wk
3 May
5 Jul
0 wk
7 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
2 Feb – 2 Mar
25 Mar
10-14 wk
11 May
3 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
Greenhouse
20 – 27 Apr
13 May
3-4 wk
18 May
3 Jun
2 wk after
Cornflower
Centaurea cyanus
3 May
15 Jul
0 wk
7 May
5 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
9 – 23 Mar
2 Apr
8-10 wk
18 May
28 May
2 wk after
Sweet William
Dianthus barbatus
8 – 22 Mar
6-8 wk
3 May
0 wk
19 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
23 Mar – 6 Apr
16 Apr
6-8 wk
18 May
28 May
2 wk after
1 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
27 Mar – 10 Apr
12 Apr
6-8 wk
22 May
24 May
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
12 Apr – 10 May
26 Apr
4-8 wk
7 Jun
5 wk after
7 Jun
5 wk after
Foxglove
Digitalis purpurea
22 Feb – 8 Mar
8-10 wk
3 May
0 wk
24 May
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
7 Mar – 4 Apr
24 May
8-12 wk
30 May
19 Jul
4 wk after
Creeping zinnia
Sanvitalia procumbens
4 – 18 Apr
14 Apr
6-8 wk
30 May
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
18 Apr – 2 May
4-6 wk
30 May
4 wk after
Chinese lantern
Physalis alkekengi
2 – 16 Mar
18 Apr
8-10 wk
11 May
13 Jun
1 wk after
Love in a mist
Nigella damascena
3 May
30 Jun
0 wk
7 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
23 Mar – 6 Apr
6 Apr
6-8 wk
18 May
18 May
2 wk after
1 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
16 Feb – 16 Mar
18 Apr
8-12 wk
11 May
13 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
23 Feb – 23 Mar
21 Mar
8-12 wk
18 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
23 Feb – 23 Mar
29 Mar
8-12 wk
18 May
24 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
23 Mar – 6 Apr
12 Apr
6-8 wk
18 May
24 May
2 wk after
Corn poppy
Papaver rhoeas
3 May
15 Jul
0 wk
7 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
8 Feb – 8 Mar
10 May
8-12 wk
3 May
5 Jul
0 wk
19 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
21 Mar – 4 Apr
12 Apr
8-10 wk
30 May
7 Jun
4 wk after
Sweet pea
Lathyrus odoratus
8 – 29 Mar
31 May
5-8 wk
3 May
5 Jul
0 wk
Stock
Matthiola incana
8 – 22 Mar
3 Jun
6-8 wk
3 May
15 Jul
0 wk
24 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
8 – 22 Mar
4 May
6-8 wk
3 May
15 Jun
0 wk
24 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
6 – 20 Apr
21 Apr
4-6 wk
18 May
19 May
2 wk after
Garden pansy
Viola × wittrockiana
22 Feb – 8 Mar
20 May
8-10 wk
3 May
15 Jul
0 wk
19 May
5 Jul
2 wk after
Petunia
Petunia
Fleece
23 Feb – 23 Mar
2 Apr
8-12 wk
18 May
28 May
2 wk after
Sweet Scabious
Scabiosa atropurpurea
16 – 30 Mar
2 May
6-8 wk
11 May
13 Jun
1 wk after
21 Jun
7 wk after
Common zinnia
Zinnia elegans
Fleece
6 – 20 Apr
6 May
4-6 wk
18 May
3 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
13 – 27 Apr
13 May
3-5 wk
18 May
3 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
18 Apr – 2 May
26 Apr
4-6 wk
30 May
4 wk after
21 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
7 Mar – 4 Apr
28 Apr
8-12 wk
30 May
23 Jun
4 wk after
Bee balm
Monarda didyma
8 Feb – 8 Mar
20 Apr
8-12 wk
3 May
15 Jun
0 wk
7 Jun
5 wk after
Yarrow
Achillea millefolium
8 – 22 Mar
4 Apr
6-8 wk
3 May
16 May
0 wk
24 May
3 wk after
Safflower
Carthamus tinctorius
3 May
15 Jun
0 wk
7 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
8 – 22 Mar
24 May
6-8 wk
3 May
5 Jul
0 wk
15 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
22 Mar – 5 Apr
7 Jun
4-6 wk
3 May
5 Jul
0 wk
24 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
23 Feb – 9 Mar
8 Mar
10-12 wk
18 May
2 wk after
Sunflower
Helianthus annuus
2 – 9 May
2 Jun
3-4 wk
30 May
23 Jun
4 wk after
7 Jun
13 Jun
5 wk after
China aster
Callistephus chinensis
4 – 18 Apr
22 May
6-8 wk
30 May
3 Jul
4 wk after
21 Jun
23 Jun
7 wk after
Annual phlox
Phlox drummondii
23 Mar – 6 Apr
14 Apr
6-8 wk
18 May
26 May
2 wk after
21 Jun
7 wk after
Hollyhock
Alcea rosea
8 – 22 Mar
6-8 wk
3 May
0 wk
24 May
3 wk after
Alpine delphinium
Delphinium elatum
8 Feb – 8 Mar
20 Apr
8-12 wk
3 May
15 Jun
0 wk
7 Jun
5 wk after
African marigold
Tagetes erecta
4 – 18 Apr
14 Apr
6-8 wk
30 May
4 wk after
Black-eyed Susan
Rudbeckia hirta
16 – 30 Mar
12 May
6-8 wk
11 May
23 Jun
1 wk after
21 Jun
7 wk after
Wood sage
Salvia nemorosa
22 Feb – 8 Mar
10 Apr
8-10 wk
3 May
5 Jun
0 wk
7 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
9 Mar – 6 Apr
22 Apr
6-10 wk
18 May
3 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
3 May
15 Jul
0 wk
7 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
21 Mar – 4 Apr
26 Apr
8-10 wk
30 May
21 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
8 – 22 Mar
4 May
6-8 wk
3 May
15 Jun
0 wk
24 May
5 Jun
3 wk after