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Rel. frost
Last spring frost (0°C) 22 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 159 days 22 Apr – 28 Sep
Probability that frost is over

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