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