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Rel. frost
Last spring frost (0°C) 23 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 157 days 23 Apr – 27 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)
5 – 19 Mar
16 Jun
5-7 wk
23 Apr
21 Jul
0 wk
27 Apr
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
12 – 26 Mar
28 Jun
4-6 wk
23 Apr
26 Jul
0 wk
27 Apr
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
16 Feb – 16 Mar
8-12 wk
11 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
5 – 19 Mar
11 Jun
5-7 wk
23 Apr
16 Jul
0 wk
23 Apr
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
13 – 20 Apr
14 May
3-4 wk
11 May
4 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
1 – 8 May
31 May
4-5 wk
5 Jun
28 Jun
6 wk after
11 Jun
18 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
17 – 24 May
3-4 wk
14 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
29 Jan – 26 Feb
30 Mar
8-12 wk
23 Apr
25 May
0 wk
14 May
15 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
27 Apr
14 Jun
1 wk after
27 Apr
4 Jun
1 wk after
Maize
Zea mays
Greenhouse
26 Mar – 2 Apr
4 May
3-4 wk
23 Apr
25 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
30 Mar – 6 Apr
5 Jul
3-4 wk
27 Apr
26 Jul
1 wk after
14 May
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
23 Apr
6 Jul
0 wk
23 Apr
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
5 – 19 Mar
11 Jun
5-7 wk
23 Apr
16 Jul
0 wk
23 Apr
6 Jul
0 wk
Potato
Solanum tuberosum
28 Mar – 11 Apr
27 May
4-6 wk
9 May
24 Jun
2 wk after
9 May
14 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
5 – 19 Mar
21 Jun
5-7 wk
23 Apr
26 Jul
0 wk
27 Apr
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Fleece
17 – 24 Apr
19 May
3-4 wk
15 May
9 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
30 Mar – 6 Apr
9 Jun
3-4 wk
27 Apr
30 Jun
1 wk after
14 May
20 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
12 – 26 Mar
23 Jun
4-6 wk
23 Apr
21 Jul
0 wk
Lettuce
Lactuca sativa
26 Mar – 2 Apr
10 Jul
3-4 wk
23 Apr
31 Jul
0 wk
27 Apr
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
12 – 26 Mar
23 Jun
4-6 wk
23 Apr
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
26 Mar – 9 Apr
2 Jun
2-4 wk
23 Apr
16 Jun
0 wk
23 Apr
6 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
27 Apr
14 Jun
1 wk after
27 Apr
4 Jun
1 wk after
Spinach
Spinacia oleracea
26 Mar – 2 Apr
25 Jul
3-4 wk
23 Apr
15 Aug
0 wk
19 Apr
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
25 May – 8 Jun
4-6 wk
6 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
26 Feb – 12 Mar
13 Apr
6-8 wk
23 Apr
25 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
13 – 27 Apr
21 May
2-4 wk
11 May
4 Jun
3 wk after
28 May
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
12 – 26 Mar
23 Jun
4-6 wk
23 Apr
21 Jul
0 wk
Garden pea
Pisum sativum
26 Mar – 2 Apr
25 Jun
3-4 wk
23 Apr
16 Jul
0 wk
27 Apr
6 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
Fleece
3 – 17 Apr
27 Apr
4-6 wk
15 May
25 May
3 wk after
Lemon balm
Melissa officinalis
12 – 26 Feb
21 May
8-10 wk
23 Apr
16 Jul
0 wk
28 May
6 Jul
5 wk after
Dill
Anethum graveolens
27 Apr
26 Jul
1 wk after
Wild chives
Allium schoenoprasum
26 Feb – 12 Mar
4 Jun
6-8 wk
23 Apr
16 Jul
0 wk
27 Apr
6 Jul
1 wk after
Spearmint
Mentha spicata
29 Jan – 26 Feb
21 May
8-12 wk
23 Apr
16 Jul
0 wk
28 May
6 Jul
5 wk after
Coriander
Coriandrum sativum
23 Apr
15 Aug
0 wk
14 May
5 Aug
3 wk after
Garden sage
Salvia officinalis
16 Feb – 2 Mar
6 May
8-10 wk
27 Apr
1 Jul
1 wk after
Common thyme
Thymus vulgaris
12 – 26 Feb
11 May
8-10 wk
23 Apr
6 Jul
0 wk
Oregano
Origanum vulgare
26 Feb – 12 Mar
25 May
6-8 wk
23 Apr
6 Jul
0 wk
28 May
26 Jun
5 wk after
Parsley
Petroselinum crispum
26 Feb – 12 Mar
25 May
6-8 wk
23 Apr
6 Jul
0 wk
27 Apr
26 Jun
1 wk after
Rosemary
Salvia rosmarinus
19 Jan – 16 Feb
7 Apr
10-14 wk
27 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
17 – 24 Apr
4 May
3-4 wk
15 May
25 May
3 wk after
Cornflower
Centaurea cyanus
23 Apr
16 Jul
0 wk
27 Apr
6 Jul
1 wk after
Statice
Limonium sinuatum
6 – 20 Mar
30 Mar
8-10 wk
15 May
25 May
3 wk after
Sweet William
Dianthus barbatus
26 Feb – 12 Mar
6-8 wk
23 Apr
0 wk
9 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
20 Mar – 3 Apr
13 Apr
6-8 wk
15 May
25 May
3 wk after
6 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
18 Mar – 1 Apr
25 Apr
6-8 wk
13 May
6 Jun
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
2 – 30 Apr
9 May
4-8 wk
28 May
6 Jun
5 wk after
28 May
5 wk after
Foxglove
Digitalis purpurea
12 – 26 Feb
8-10 wk
23 Apr
0 wk
14 May
3 wk after
Busy lizzie
Impatiens walleriana
13 Mar – 10 Apr
15 May
8-12 wk
5 Jun
10 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
20 Mar – 3 Apr
23 Apr
6-8 wk
15 May
4 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
3 – 17 Apr
4-6 wk
15 May
3 wk after
Chinese lantern
Physalis alkekengi
16 Feb – 2 Mar
21 Apr
8-10 wk
27 Apr
16 Jun
1 wk after
Love in a mist
Nigella damascena
23 Apr
1 Jul
0 wk
27 Apr
21 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
16 – 30 Mar
19 Apr
6-8 wk
11 May
31 May
3 wk after
21 Jun
8 wk after
Purple-top vervain
Verbena bonariensis
2 Feb – 2 Mar
21 Apr
8-12 wk
27 Apr
16 Jun
1 wk after
Cardoon
Cynara cardunculus
20 Feb – 20 Mar
22 Mar
8-12 wk
15 May
17 May
3 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
16 Feb – 16 Mar
11 Apr
8-12 wk
11 May
6 Jun
3 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
16 – 30 Mar
25 Apr
6-8 wk
11 May
6 Jun
3 wk after
Corn poppy
Papaver rhoeas
23 Apr
16 Jul
0 wk
27 Apr
6 Jul
1 wk after
Snapdragon
Antirrhinum majus
29 Jan – 26 Feb
11 May
8-12 wk
23 Apr
6 Jul
0 wk
9 May
26 Jun
2 wk after
Flossflower
Ageratum houstonianum
27 Mar – 10 Apr
9 Apr
8-10 wk
5 Jun
6 wk after
Sweet pea
Lathyrus odoratus
26 Feb – 19 Mar
1 Jun
5-8 wk
23 Apr
6 Jul
0 wk
Stock
Matthiola incana
26 Feb – 12 Mar
4 Jun
6-8 wk
23 Apr
16 Jul
0 wk
14 May
6 Jul
3 wk after
Wormwood
Artemisia absinthium
26 Feb – 12 Mar
5 May
6-8 wk
23 Apr
16 Jun
0 wk
14 May
6 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
30 Mar – 13 Apr
4 May
4-6 wk
11 May
1 Jun
3 wk after
Garden pansy
Viola × wittrockiana
12 – 26 Feb
21 May
8-10 wk
23 Apr
16 Jul
0 wk
9 May
6 Jul
2 wk after
Petunia
Petunia
20 Feb – 20 Mar
30 Mar
8-12 wk
15 May
25 May
3 wk after
Sweet Scabious
Scabiosa atropurpurea
2 – 16 Mar
5 May
6-8 wk
27 Apr
16 Jun
1 wk after
11 Jun
7 wk after
Common zinnia
Zinnia elegans
3 – 17 Apr
27 Apr
4-6 wk
15 May
25 May
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
10 – 24 Apr
4 May
3-5 wk
15 May
25 May
3 wk after
Garden cosmos
Cosmos bipinnatus
3 – 17 Apr
9 May
4-6 wk
15 May
6 Jun
3 wk after
11 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
13 Mar – 10 Apr
19 Apr
8-12 wk
5 Jun
14 Jun
6 wk after
Bee balm
Monarda didyma
29 Jan – 26 Feb
21 Apr
8-12 wk
23 Apr
16 Jun
0 wk
28 May
6 Jun
5 wk after
Yarrow
Achillea millefolium
26 Feb – 12 Mar
5 Apr
6-8 wk
23 Apr
17 May
0 wk
14 May
3 wk after
Safflower
Carthamus tinctorius
23 Apr
16 Jun
0 wk
27 Apr
6 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
26 Feb – 12 Mar
25 May
6-8 wk
23 Apr
6 Jul
0 wk
5 Apr
26 Jun
3 wk before
Bishop's flower
Ammi majus
12 – 26 Mar
8 Jun
4-6 wk
23 Apr
6 Jul
0 wk
14 May
26 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
16 Feb – 2 Mar
18 Mar
10-12 wk
11 May
27 May
3 wk after
Sunflower
Helianthus annuus
17 – 24 Apr
15 Jun
3-4 wk
15 May
6 Jul
3 wk after
28 May
26 Jun
5 wk after
China aster
Callistephus chinensis
20 Mar – 3 Apr
4 Jun
6-8 wk
15 May
16 Jul
3 wk after
11 Jun
6 Jul
7 wk after
Annual phlox
Phlox drummondii
16 – 30 Mar
23 Apr
6-8 wk
11 May
4 Jun
3 wk after
11 Jun
7 wk after
Hollyhock
Alcea rosea
26 Feb – 12 Mar
6-8 wk
23 Apr
0 wk
14 May
3 wk after
Alpine delphinium
Delphinium elatum
29 Jan – 26 Feb
21 Apr
8-12 wk
23 Apr
16 Jun
0 wk
28 May
6 Jun
5 wk after
African marigold
Tagetes erecta
20 Mar – 3 Apr
23 Apr
6-8 wk
15 May
4 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
2 – 16 Mar
25 May
6-8 wk
27 Apr
6 Jul
1 wk after
11 Jun
26 Jun
7 wk after
Wood sage
Salvia nemorosa
12 – 26 Feb
11 Apr
8-10 wk
23 Apr
6 Jun
0 wk
28 May
5 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
6 Mar – 3 Apr
13 Apr
6-10 wk
15 May
25 May
3 wk after
California goldenpoppy
Eschscholzia californica
23 Apr
16 Jul
0 wk
27 Apr
6 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
6 – 20 Mar
3 May
8-10 wk
15 May
28 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
26 Feb – 12 Mar
5 May
6-8 wk
23 Apr
16 Jun
0 wk
14 May
6 Jun
3 wk after