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Rel. frost
Last spring frost (0°C) 26 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 156 days 26 Apr – 29 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)
8 – 22 Mar
21 Jun
5-7 wk
26 Apr
26 Jul
0 wk
20 Apr
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
15 – 29 Mar
3 Jul
4-6 wk
26 Apr
31 Jul
0 wk
20 Apr
21 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
19 Feb – 19 Mar
8-12 wk
14 May
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
8 – 22 Mar
16 Jun
5-7 wk
26 Apr
21 Jul
0 wk
13 Apr
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
16 – 23 Apr
19 May
3-4 wk
14 May
9 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
2 – 9 May
31 May
4-5 wk
6 Jun
28 Jun
6 wk after
6 Jun
18 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
19 – 26 May
3-4 wk
16 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
1 Feb – 1 Mar
4 Apr
8-12 wk
26 Apr
30 May
0 wk
9 May
20 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
20 Apr
19 Jun
1 wk before
20 Apr
9 Jun
1 wk before
Maize
Zea mays
Greenhouse
29 Mar – 5 Apr
9 May
3-4 wk
26 Apr
30 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
29 Mar – 5 Apr
8 Jul
3-4 wk
26 Apr
29 Jul
0 wk
9 May
19 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
26 Apr
11 Jul
0 wk
13 Apr
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
8 – 22 Mar
16 Jun
5-7 wk
26 Apr
21 Jul
0 wk
13 Apr
11 Jul
2 wk before
Potato
Solanum tuberosum
20 Mar – 3 Apr
8 Jun
4-6 wk
1 May
6 Jul
1 wk after
1 May
26 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
8 – 22 Mar
26 Jun
5-7 wk
26 Apr
31 Jul
0 wk
20 Apr
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
25 Apr – 2 May
24 May
3-4 wk
23 May
14 Jun
4 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
29 Mar – 5 Apr
17 Jun
3-4 wk
26 Apr
8 Jul
0 wk
9 May
28 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
15 – 29 Mar
28 Jun
4-6 wk
26 Apr
26 Jul
0 wk
Lettuce
Lactuca sativa
29 Mar – 5 Apr
15 Jul
3-4 wk
26 Apr
5 Aug
0 wk
20 Apr
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
15 – 29 Mar
28 Jun
4-6 wk
26 Apr
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
16 – 30 Mar
7 Jun
2-4 wk
13 Apr
21 Jun
2 wk before
13 Apr
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
20 Apr
19 Jun
1 wk before
20 Apr
9 Jun
1 wk before
Spinach
Spinacia oleracea
29 Mar – 5 Apr
30 Jul
3-4 wk
26 Apr
20 Aug
0 wk
6 Apr
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
28 May – 11 Jun
4-6 wk
9 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
1 – 15 Mar
18 Apr
6-8 wk
26 Apr
30 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
16 – 30 Apr
26 May
2-4 wk
14 May
9 Jun
3 wk after
22 May
30 May
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
15 – 29 Mar
28 Jun
4-6 wk
26 Apr
26 Jul
0 wk
Garden pea
Pisum sativum
29 Mar – 5 Apr
30 Jun
3-4 wk
26 Apr
21 Jul
0 wk
20 Apr
11 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
11 – 25 Apr
2 May
4-6 wk
23 May
30 May
4 wk after
Lemon balm
Melissa officinalis
15 Feb – 1 Mar
26 May
8-10 wk
26 Apr
21 Jul
0 wk
22 May
11 Jul
4 wk after
Dill
Anethum graveolens
20 Apr
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
1 – 15 Mar
9 Jun
6-8 wk
26 Apr
21 Jul
0 wk
20 Apr
11 Jul
1 wk before
Spearmint
Mentha spicata
1 Feb – 1 Mar
26 May
8-12 wk
26 Apr
21 Jul
0 wk
22 May
11 Jul
4 wk after
Coriander
Coriandrum sativum
26 Apr
18 Aug
0 wk
9 May
8 Aug
2 wk after
Garden sage
Salvia officinalis
15 Feb – 1 Mar
11 May
8-10 wk
26 Apr
6 Jul
0 wk
Common thyme
Thymus vulgaris
15 Feb – 1 Mar
16 May
8-10 wk
26 Apr
11 Jul
0 wk
Oregano
Origanum vulgare
1 – 15 Mar
30 May
6-8 wk
26 Apr
11 Jul
0 wk
22 May
1 Jul
4 wk after
Parsley
Petroselinum crispum
1 – 15 Mar
30 May
6-8 wk
26 Apr
11 Jul
0 wk
20 Apr
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
18 Jan – 15 Feb
6 Apr
10-14 wk
26 Apr
15 Jun
0 wk

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
25 Apr – 2 May
9 May
3-4 wk
23 May
30 May
4 wk after
Cornflower
Centaurea cyanus
26 Apr
21 Jul
0 wk
20 Apr
11 Jul
1 wk before
Statice
Limonium sinuatum
14 – 28 Mar
2 Apr
8-10 wk
23 May
28 May
4 wk after
Sweet William
Dianthus barbatus
1 – 15 Mar
6-8 wk
26 Apr
0 wk
1 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
28 Mar – 11 Apr
16 Apr
6-8 wk
23 May
28 May
4 wk after
9 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
23 Mar – 6 Apr
18 Apr
6-8 wk
18 May
30 May
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
27 Mar – 24 Apr
2 May
4-8 wk
22 May
30 May
4 wk after
22 May
4 wk after
Foxglove
Digitalis purpurea
15 Feb – 1 Mar
8-10 wk
26 Apr
0 wk
9 May
2 wk after
Busy lizzie
Impatiens walleriana
14 Mar – 11 Apr
20 May
8-12 wk
6 Jun
15 Jul
6 wk after
Creeping zinnia
Sanvitalia procumbens
28 Mar – 11 Apr
26 Apr
6-8 wk
23 May
7 Jun
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
11 – 25 Apr
4-6 wk
23 May
4 wk after
Chinese lantern
Physalis alkekengi
15 Feb – 1 Mar
24 Apr
8-10 wk
26 Apr
19 Jun
0 wk
Love in a mist
Nigella damascena
26 Apr
6 Jul
0 wk
20 Apr
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
Fleece
19 Mar – 2 Apr
18 Apr
6-8 wk
14 May
30 May
3 wk after
11 Jun
7 wk after
Purple-top vervain
Verbena bonariensis
1 Feb – 1 Mar
24 Apr
8-12 wk
26 Apr
19 Jun
0 wk
Cardoon
Cynara cardunculus
28 Feb – 28 Mar
25 Mar
8-12 wk
23 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
28 Feb – 28 Mar
25 Mar
8-12 wk
23 May
4 wk after
Globe amaranth
Gomphrena globosa
Fleece
28 Mar – 11 Apr
8 Apr
6-8 wk
23 May
4 wk after
Corn poppy
Papaver rhoeas
26 Apr
21 Jul
0 wk
20 Apr
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
1 Feb – 1 Mar
16 May
8-12 wk
26 Apr
11 Jul
0 wk
1 May
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
28 Mar – 11 Apr
12 Apr
8-10 wk
6 Jun
7 Jun
6 wk after
Sweet pea
Lathyrus odoratus
1 – 22 Mar
6 Jun
5-8 wk
26 Apr
11 Jul
0 wk
Stock
Matthiola incana
1 – 15 Mar
9 Jun
6-8 wk
26 Apr
21 Jul
0 wk
9 May
11 Jul
2 wk after
Wormwood
Artemisia absinthium
1 – 15 Mar
10 May
6-8 wk
26 Apr
21 Jun
0 wk
9 May
11 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
2 – 16 Apr
27 Apr
4-6 wk
14 May
25 May
3 wk after
Garden pansy
Viola × wittrockiana
15 Feb – 1 Mar
26 May
8-10 wk
26 Apr
21 Jul
0 wk
1 May
11 Jul
1 wk after
Petunia
Petunia
28 Feb – 28 Mar
2 Apr
8-12 wk
23 May
28 May
4 wk after
Sweet Scabious
Scabiosa atropurpurea
1 – 15 Mar
8 May
6-8 wk
26 Apr
19 Jun
0 wk
6 Jun
9 Jun
6 wk after
Common zinnia
Zinnia elegans
11 – 25 Apr
2 May
4-6 wk
23 May
30 May
4 wk after
Common morning glory
Ipomoea purpurea
Fleece
18 Apr – 2 May
9 May
3-5 wk
23 May
30 May
4 wk after
Garden cosmos
Cosmos bipinnatus
11 – 25 Apr
2 May
4-6 wk
23 May
30 May
4 wk after
6 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
14 Mar – 11 Apr
24 Apr
8-12 wk
6 Jun
19 Jun
6 wk after
Bee balm
Monarda didyma
1 Feb – 1 Mar
26 Apr
8-12 wk
26 Apr
21 Jun
0 wk
22 May
11 Jun
4 wk after
Yarrow
Achillea millefolium
1 – 15 Mar
10 Apr
6-8 wk
26 Apr
22 May
0 wk
9 May
12 May
2 wk after
Safflower
Carthamus tinctorius
26 Apr
21 Jun
0 wk
20 Apr
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
1 – 15 Mar
30 May
6-8 wk
26 Apr
11 Jul
0 wk
11 Mar
1 Jul
7 wk before
Bishop's flower
Ammi majus
15 – 29 Mar
13 Jun
4-6 wk
26 Apr
11 Jul
0 wk
9 May
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
19 Feb – 5 Mar
20 Mar
10-12 wk
14 May
29 May
3 wk after
Sunflower
Helianthus annuus
25 Apr – 2 May
14 Jun
3-4 wk
23 May
5 Jul
4 wk after
22 May
25 Jun
4 wk after
China aster
Callistephus chinensis
28 Mar – 11 Apr
3 Jun
6-8 wk
23 May
15 Jul
4 wk after
6 Jun
5 Jul
6 wk after
Annual phlox
Phlox drummondii
19 Mar – 2 Apr
26 Apr
6-8 wk
14 May
7 Jun
3 wk after
6 Jun
6 wk after
Hollyhock
Alcea rosea
1 – 15 Mar
6-8 wk
26 Apr
0 wk
9 May
2 wk after
Alpine delphinium
Delphinium elatum
1 Feb – 1 Mar
26 Apr
8-12 wk
26 Apr
21 Jun
0 wk
22 May
11 Jun
4 wk after
African marigold
Tagetes erecta
28 Mar – 11 Apr
26 Apr
6-8 wk
23 May
7 Jun
4 wk after
Black-eyed Susan
Rudbeckia hirta
1 – 15 Mar
24 May
6-8 wk
26 Apr
5 Jul
0 wk
6 Jun
25 Jun
6 wk after
Wood sage
Salvia nemorosa
15 Feb – 1 Mar
16 Apr
8-10 wk
26 Apr
11 Jun
0 wk
22 May
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
14 Mar – 11 Apr
18 Apr
6-10 wk
23 May
30 May
4 wk after
California goldenpoppy
Eschscholzia californica
26 Apr
21 Jul
0 wk
20 Apr
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
14 – 28 Mar
3 May
8-10 wk
23 May
28 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
1 – 15 Mar
10 May
6-8 wk
26 Apr
21 Jun
0 wk
9 May
11 Jun
2 wk after