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Rel. frost
Last spring frost (0°C) 27 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 147 days 27 Apr – 21 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)
9 – 23 Mar
14 Jun
5-7 wk
27 Apr
19 Jul
0 wk
1 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
16 – 30 Mar
26 Jun
4-6 wk
27 Apr
24 Jul
0 wk
1 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
15 Feb – 15 Mar
8-12 wk
10 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
9 – 23 Mar
9 Jun
5-7 wk
27 Apr
14 Jul
0 wk
27 Apr
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
12 – 19 Apr
12 Apr
3-4 wk
10 May
2 wk after
Florence Fennel
Foeniculum vulgare
28 Apr – 5 May
28 May
4-5 wk
2 Jun
25 Jun
5 wk after
15 Jun
15 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
15 – 22 May
3-4 wk
12 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
2 Feb – 2 Mar
26 Mar
8-12 wk
27 Apr
21 May
0 wk
18 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
1 May
10 Jun
1 wk after
1 May
31 May
1 wk after
Maize
Zea mays
Season too short
30 Mar – 6 Apr
2 Apr
3-4 wk
27 Apr
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
6 – 13 Apr
1 Jul
3-4 wk
4 May
22 Jul
1 wk after
18 May
12 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
27 Apr
4 Jul
0 wk
27 Apr
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
9 – 23 Mar
9 Jun
5-7 wk
27 Apr
14 Jul
0 wk
27 Apr
4 Jul
0 wk
Potato
Solanum tuberosum
1 – 15 Apr
22 May
4-6 wk
13 May
19 Jun
2 wk after
13 May
9 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
9 – 23 Mar
19 Jun
5-7 wk
27 Apr
24 Jul
0 wk
1 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
12 – 19 Apr
15 May
3-4 wk
10 May
5 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
6 – 13 Apr
26 May
3-4 wk
4 May
16 Jun
1 wk after
18 May
6 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
16 – 30 Mar
21 Jun
4-6 wk
27 Apr
19 Jul
0 wk
Lettuce
Lactuca sativa
30 Mar – 6 Apr
8 Jul
3-4 wk
27 Apr
29 Jul
0 wk
1 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
16 – 30 Mar
21 Jun
4-6 wk
27 Apr
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
30 Mar – 13 Apr
29 May
2-4 wk
27 Apr
12 Jun
0 wk
27 Apr
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
1 May
10 Jun
1 wk after
1 May
31 May
1 wk after
Spinach
Spinacia oleracea
30 Mar – 6 Apr
23 Jul
3-4 wk
27 Apr
13 Aug
0 wk
23 Apr
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
29 May – 12 Jun
4-6 wk
10 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
2 – 16 Mar
12 Mar
6-8 wk
27 Apr
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
30 Mar – 13 Apr
17 May
2-4 wk
27 Apr
31 May
0 wk
18 May
21 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
16 – 30 Mar
21 Jun
4-6 wk
27 Apr
19 Jul
0 wk
Garden pea
Pisum sativum
30 Mar – 6 Apr
23 Jun
3-4 wk
27 Apr
14 Jul
0 wk
1 May
4 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
29 Mar – 12 Apr
23 Apr
4-6 wk
10 May
21 May
2 wk after
Lemon balm
Melissa officinalis
16 Feb – 2 Mar
19 May
8-10 wk
27 Apr
14 Jul
0 wk
1 Jun
4 Jul
5 wk after
Dill
Anethum graveolens
1 May
22 Jul
1 wk after
Wild chives
Allium schoenoprasum
2 – 16 Mar
2 Jun
6-8 wk
27 Apr
14 Jul
0 wk
1 May
4 Jul
1 wk after
Spearmint
Mentha spicata
2 Feb – 2 Mar
19 May
8-12 wk
27 Apr
14 Jul
0 wk
1 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
27 Apr
11 Aug
0 wk
18 May
1 Aug
3 wk after
Garden sage
Salvia officinalis
23 Feb – 9 Mar
4 May
8-10 wk
4 May
29 Jun
1 wk after
Common thyme
Thymus vulgaris
16 Feb – 2 Mar
9 May
8-10 wk
27 Apr
4 Jul
0 wk
Oregano
Origanum vulgare
2 – 16 Mar
23 May
6-8 wk
27 Apr
4 Jul
0 wk
1 Jun
24 Jun
5 wk after
Parsley
Petroselinum crispum
2 – 16 Mar
23 May
6-8 wk
27 Apr
4 Jul
0 wk
1 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
26 Jan – 23 Feb
3 Apr
10-14 wk
4 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
Greenhouse
12 – 19 Apr
30 Apr
3-4 wk
10 May
21 May
2 wk after
Cornflower
Centaurea cyanus
27 Apr
14 Jul
0 wk
1 May
4 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
1 – 15 Mar
31 Mar
8-10 wk
10 May
26 May
2 wk after
Sweet William
Dianthus barbatus
2 – 16 Mar
6-8 wk
27 Apr
0 wk
13 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
15 – 29 Mar
14 Apr
6-8 wk
10 May
26 May
2 wk after
25 Jun
8 wk after
Pinnate dahlia
Dahlia × pinnata
17 – 31 Mar
30 Mar
6-8 wk
12 May
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
6 Apr – 4 May
13 Apr
4-8 wk
1 Jun
5 wk after
1 Jun
5 wk after
Foxglove
Digitalis purpurea
16 Feb – 2 Mar
8-10 wk
27 Apr
0 wk
18 May
3 wk after
Busy lizzie
Impatiens walleriana
10 Mar – 7 Apr
13 Apr
8-12 wk
2 Jun
8 Jun
5 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
15 – 29 Mar
24 Apr
6-8 wk
10 May
5 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
7 – 21 Apr
4-6 wk
19 May
3 wk after
Chinese lantern
Physalis alkekengi
23 Feb – 9 Mar
17 Apr
8-10 wk
4 May
12 Jun
1 wk after
Love in a mist
Nigella damascena
27 Apr
29 Jun
0 wk
1 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
15 – 29 Mar
4 Apr
6-8 wk
10 May
16 May
2 wk after
25 Jun
8 wk after
Purple-top vervain
Verbena bonariensis
9 Feb – 9 Mar
17 Apr
8-12 wk
4 May
12 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
15 Feb – 15 Mar
20 Mar
8-12 wk
10 May
15 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
15 Feb – 15 Mar
16 Mar
8-12 wk
10 May
11 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
15 – 29 Mar
30 Mar
6-8 wk
10 May
11 May
2 wk after
Corn poppy
Papaver rhoeas
27 Apr
14 Jul
0 wk
1 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
2 Feb – 2 Mar
9 May
8-12 wk
27 Apr
4 Jul
0 wk
13 May
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
10 – 24 Mar
10 Apr
8-10 wk
19 May
5 Jun
3 wk after
Sweet pea
Lathyrus odoratus
2 – 23 Mar
30 May
5-8 wk
27 Apr
4 Jul
0 wk
Stock
Matthiola incana
2 – 16 Mar
2 Jun
6-8 wk
27 Apr
14 Jul
0 wk
18 May
4 Jul
3 wk after
Wormwood
Artemisia absinthium
2 – 16 Mar
3 May
6-8 wk
27 Apr
14 Jun
0 wk
18 May
4 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
29 Mar – 12 Apr
8 Apr
4-6 wk
10 May
2 wk after
Garden pansy
Viola × wittrockiana
16 Feb – 2 Mar
19 May
8-10 wk
27 Apr
14 Jul
0 wk
13 May
4 Jul
2 wk after
Petunia
Petunia
Fleece
15 Feb – 15 Mar
31 Mar
8-12 wk
10 May
26 May
2 wk after
Sweet Scabious
Scabiosa atropurpurea
9 – 23 Mar
1 May
6-8 wk
4 May
12 Jun
1 wk after
15 Jun
7 wk after
Common zinnia
Zinnia elegans
Fleece
29 Mar – 12 Apr
23 Apr
4-6 wk
10 May
21 May
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
5 – 19 Apr
30 Apr
3-5 wk
10 May
21 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
29 Mar – 12 Apr
3 May
4-6 wk
10 May
31 May
2 wk after
1 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
24 Feb – 24 Mar
15 Apr
8-12 wk
19 May
10 Jun
3 wk after
Bee balm
Monarda didyma
2 Feb – 2 Mar
19 Apr
8-12 wk
27 Apr
14 Jun
0 wk
1 Jun
4 Jun
5 wk after
Yarrow
Achillea millefolium
2 – 16 Mar
3 Apr
6-8 wk
27 Apr
15 May
0 wk
18 May
3 wk after
Safflower
Carthamus tinctorius
27 Apr
14 Jun
0 wk
1 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
2 – 16 Mar
23 May
6-8 wk
27 Apr
4 Jul
0 wk
9 Apr
24 Jun
3 wk before
Bishop's flower
Ammi majus
16 – 30 Mar
6 Jun
4-6 wk
27 Apr
4 Jul
0 wk
18 May
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
15 Feb – 1 Mar
2 Mar
10-12 wk
10 May
11 May
2 wk after
Sunflower
Helianthus annuus
21 – 28 Apr
11 Jun
3-4 wk
19 May
2 Jul
3 wk after
1 Jun
22 Jun
5 wk after
China aster
Callistephus chinensis
24 Mar – 7 Apr
31 May
6-8 wk
19 May
12 Jul
3 wk after
15 Jun
2 Jul
7 wk after
Annual phlox
Phlox drummondii
15 – 29 Mar
28 Mar
6-8 wk
10 May
2 wk after
15 Jun
7 wk after
Hollyhock
Alcea rosea
2 – 16 Mar
6-8 wk
27 Apr
0 wk
18 May
3 wk after
Alpine delphinium
Delphinium elatum
2 Feb – 2 Mar
19 Apr
8-12 wk
27 Apr
14 Jun
0 wk
1 Jun
4 Jun
5 wk after
African marigold
Tagetes erecta
Fleece
15 – 29 Mar
24 Apr
6-8 wk
10 May
5 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
9 – 23 Mar
21 May
6-8 wk
4 May
2 Jul
1 wk after
15 Jun
22 Jun
7 wk after
Wood sage
Salvia nemorosa
16 Feb – 2 Mar
9 Apr
8-10 wk
27 Apr
4 Jun
0 wk
1 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
1 – 29 Mar
9 Apr
6-10 wk
10 May
21 May
2 wk after
California goldenpoppy
Eschscholzia californica
27 Apr
14 Jul
0 wk
1 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
10 – 24 Mar
30 Apr
8-10 wk
19 May
25 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
2 – 16 Mar
3 May
6-8 wk
27 Apr
14 Jun
0 wk
18 May
4 Jun
3 wk after