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Rel. frost
Last spring frost (0°C) 15 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 172 days 15 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)
26 Mar – 9 Apr
18 Jun
5-7 wk
14 May
23 Jul
4 wk after
8 Apr
13 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
18 Mar – 1 Apr
30 Jun
4-6 wk
29 Apr
28 Jul
2 wk after
8 Apr
18 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
25 Feb – 25 Mar
3 Mar
8-12 wk
20 May
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
31 Jan – 14 Feb
13 Jun
5-7 wk
21 Mar
18 Jul
4 wk before
3 Apr
8 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
4 – 11 May
3-4 wk
1 Jun
7 wk after
Florence Fennel
Foeniculum vulgare
5 – 12 May
6 Jun
4-5 wk
9 Jun
4 Jul
8 wk after
21 May
24 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
14 – 21 May
3-4 wk
11 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
21 Jan – 18 Feb
3 Apr
8-12 wk
15 Apr
29 May
Vid frost
25 Apr
19 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
8 Apr
18 Jun
1 wk before
8 Apr
8 Jun
1 wk before
Maize
Zea mays
Fleece
22 – 29 Apr
3-4 wk
20 May
5 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
16 – 23 Apr
7 Jul
3-4 wk
14 May
28 Jul
4 wk after
25 Apr
18 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
3 Apr
28 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
31 Jan – 14 Feb
13 Jun
5-7 wk
21 Mar
18 Jul
4 wk before
3 Apr
8 Jul
2 wk before
Potato
Solanum tuberosum
9 – 23 Mar
10 Jun
4-6 wk
20 Apr
8 Jul
1 wk after
20 Apr
28 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
31 Jan – 14 Feb
23 Jun
5-7 wk
21 Mar
28 Jul
4 wk before
8 Apr
18 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
4 – 11 May
30 May
3-4 wk
1 Jun
20 Jun
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
16 – 23 Apr
25 Jun
3-4 wk
14 May
16 Jul
4 wk after
25 Apr
6 Jul
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
18 Mar – 1 Apr
25 Jun
4-6 wk
29 Apr
23 Jul
2 wk after
Lettuce
Lactuca sativa
11 – 18 Mar
12 Jul
3-4 wk
8 Apr
2 Aug
1 wk before
8 Apr
23 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
25 Feb – 11 Mar
25 Jun
4-6 wk
8 Apr
23 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
6 – 20 Mar
4 Jun
2-4 wk
3 Apr
18 Jun
2 wk before
3 Apr
8 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
8 Apr
18 Jun
1 wk before
8 Apr
8 Jun
1 wk before
Spinach
Spinacia oleracea
3 – 10 Mar
27 Jul
3-4 wk
31 Mar
17 Aug
2 wk before
28 Mar
7 Aug
3 wk before
Sweet potato
Ipomoea batatas
12 – 26 May
4-6 wk
23 Jun
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
25 Mar – 8 Apr
27 Mar
6-8 wk
20 May
5 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
4 – 18 May
4 May
2-4 wk
1 Jun
7 wk after
21 May
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
18 Mar – 1 Apr
25 Jun
4-6 wk
29 Apr
23 Jul
2 wk after
Garden pea
Pisum sativum
3 – 10 Mar
27 Jun
3-4 wk
31 Mar
18 Jul
2 wk before
8 Apr
8 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
20 Apr – 4 May
8 May
4-6 wk
1 Jun
5 Jun
7 wk after
Lemon balm
Melissa officinalis
4 – 18 Feb
23 May
8-10 wk
15 Apr
18 Jul
Vid frost
6 May
8 Jul
3 wk after
Dill
Anethum graveolens
8 Apr
28 Jul
1 wk before
Wild chives
Allium schoenoprasum
24 Jan – 7 Feb
6 Jun
6-8 wk
21 Mar
18 Jul
4 wk before
8 Apr
8 Jul
1 wk before
Spearmint
Mentha spicata
6 Jan – 3 Feb
23 May
8-12 wk
31 Mar
18 Jul
2 wk before
6 May
8 Jul
3 wk after
Coriander
Coriandrum sativum
25 Apr
7 Aug
1 wk after
Garden sage
Salvia officinalis
5 – 19 Mar
8 May
8-10 wk
14 May
3 Jul
4 wk after
Common thyme
Thymus vulgaris
18 Feb – 4 Mar
13 May
8-10 wk
29 Apr
8 Jul
2 wk after
Oregano
Origanum vulgare
24 Feb – 10 Mar
27 May
6-8 wk
21 Apr
8 Jul
1 wk after
6 May
28 Jun
3 wk after
Parsley
Petroselinum crispum
3 – 17 Feb
27 May
6-8 wk
31 Mar
8 Jul
2 wk before
8 Apr
28 Jun
1 wk before
Rosemary
Salvia rosmarinus
5 Feb – 5 Mar
5 Apr
10-14 wk
14 May
14 Jun
4 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
4 – 11 May
15 May
3-4 wk
1 Jun
5 Jun
7 wk after
Cornflower
Centaurea cyanus
31 Mar
18 Jul
2 wk before
8 Apr
8 Jul
1 wk before
Statice
Limonium sinuatum
23 Mar – 6 Apr
2 Apr
8-10 wk
1 Jun
7 wk after
Sweet William
Dianthus barbatus
3 – 17 Feb
6-8 wk
31 Mar
2 wk before
20 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
6 – 20 Apr
16 Apr
6-8 wk
1 Jun
7 wk after
23 Jun
10 wk after
Pinnate dahlia
Dahlia × pinnata
31 Mar – 14 Apr
17 Apr
6-8 wk
26 May
29 May
6 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
11 Mar – 8 Apr
1 May
4-8 wk
6 May
29 May
3 wk after
6 May
19 May
3 wk after
Foxglove
Digitalis purpurea
20 Jan – 3 Feb
8-10 wk
31 Mar
2 wk before
25 Apr
1 wk after
Busy lizzie
Impatiens walleriana
17 Mar – 14 Apr
26 May
8-12 wk
9 Jun
21 Jul
8 wk after
Creeping zinnia
Sanvitalia procumbens
6 – 20 Apr
26 Apr
6-8 wk
1 Jun
7 Jun
7 wk after
Hyacinth bean
Dolichos lablab
Season too short
20 Apr – 4 May
4-6 wk
1 Jun
7 wk after
Chinese lantern
Physalis alkekengi
5 – 19 Mar
23 Apr
8-10 wk
14 May
18 Jun
4 wk after
Love in a mist
Nigella damascena
8 Apr
23 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
6 – 20 Apr
6 Apr
6-8 wk
1 Jun
7 wk after
23 Jun
10 wk after
Purple-top vervain
Verbena bonariensis
19 Feb – 19 Mar
23 Apr
8-12 wk
14 May
18 Jun
4 wk after
Cardoon
Cynara cardunculus
9 Mar – 6 Apr
24 Mar
8-12 wk
1 Jun
7 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
9 Mar – 6 Apr
31 Mar
8-12 wk
1 Jun
7 wk after
Globe amaranth
Gomphrena globosa
Fleece
6 – 20 Apr
14 Apr
6-8 wk
1 Jun
7 wk after
Corn poppy
Papaver rhoeas
8 Apr
8 Jul
1 wk before
Snapdragon
Antirrhinum majus
14 Jan – 11 Feb
13 May
8-12 wk
8 Apr
8 Jul
1 wk before
20 Apr
28 Jun
1 wk after
Flossflower
Ageratum houstonianum
31 Mar – 14 Apr
12 Apr
8-10 wk
9 Jun
8 wk after
Sweet pea
Lathyrus odoratus
3 – 24 Feb
3 Jun
5-8 wk
31 Mar
8 Jul
2 wk before
Stock
Matthiola incana
11 – 25 Feb
6 Jun
6-8 wk
8 Apr
18 Jul
1 wk before
25 Apr
8 Jul
1 wk after
Wormwood
Artemisia absinthium
3 – 17 Feb
7 May
6-8 wk
31 Mar
18 Jun
2 wk before
25 Apr
8 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
20 Apr – 4 May
23 Apr
4-6 wk
1 Jun
7 wk after
Garden pansy
Viola × wittrockiana
10 – 24 Jan
23 May
8-10 wk
21 Mar
18 Jul
4 wk before
20 Apr
8 Jul
1 wk after
Petunia
Petunia
9 Mar – 6 Apr
2 Apr
8-12 wk
1 Jun
7 wk after
Sweet Scabious
Scabiosa atropurpurea
19 Mar – 2 Apr
7 May
6-8 wk
14 May
18 Jun
4 wk after
21 May
8 Jun
5 wk after
Common zinnia
Zinnia elegans
20 Apr – 4 May
8 May
4-6 wk
1 Jun
5 Jun
7 wk after
Common morning glory
Ipomoea purpurea
Fleece
27 Apr – 11 May
15 May
3-5 wk
1 Jun
5 Jun
7 wk after
Garden cosmos
Cosmos bipinnatus
20 Apr – 4 May
1 May
4-6 wk
1 Jun
7 wk after
21 May
5 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
17 Mar – 14 Apr
30 Apr
8-12 wk
9 Jun
25 Jun
8 wk after
Bee balm
Monarda didyma
21 Jan – 18 Feb
23 Apr
8-12 wk
15 Apr
18 Jun
Vid frost
6 May
8 Jun
3 wk after
Yarrow
Achillea millefolium
3 – 17 Feb
7 Apr
6-8 wk
31 Mar
19 May
2 wk before
25 Apr
9 May
1 wk after
Safflower
Carthamus tinctorius
31 Mar
18 Jun
2 wk before
8 Apr
8 Jun
1 wk before
Iceland poppy
Papaver nudicaule
24 Jan – 7 Feb
27 May
6-8 wk
21 Mar
8 Jul
4 wk before
3 Apr
28 Jun
2 wk before
Bishop's flower
Ammi majus
14 – 28 Mar
10 Jun
4-6 wk
25 Apr
8 Jul
1 wk after
25 Apr
28 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
25 Feb – 11 Mar
24 Mar
10-12 wk
20 May
2 Jun
5 wk after
Sunflower
Helianthus annuus
4 – 11 May
13 Jun
3-4 wk
1 Jun
4 Jul
7 wk after
6 May
24 Jun
3 wk after
China aster
Callistephus chinensis
6 – 20 Apr
2 Jun
6-8 wk
1 Jun
14 Jul
7 wk after
21 May
4 Jul
5 wk after
Annual phlox
Phlox drummondii
25 Mar – 8 Apr
26 Apr
6-8 wk
20 May
7 Jun
5 wk after
21 May
28 May
5 wk after
Hollyhock
Alcea rosea
3 – 17 Feb
6-8 wk
31 Mar
2 wk before
25 Apr
1 wk after
Alpine delphinium
Delphinium elatum
4 Feb – 4 Mar
23 Apr
8-12 wk
29 Apr
18 Jun
2 wk after
6 May
8 Jun
3 wk after
African marigold
Tagetes erecta
6 – 20 Apr
26 Apr
6-8 wk
1 Jun
7 Jun
7 wk after
Black-eyed Susan
Rudbeckia hirta
19 Mar – 2 Apr
23 May
6-8 wk
14 May
4 Jul
4 wk after
21 May
24 Jun
5 wk after
Wood sage
Salvia nemorosa
10 – 24 Feb
13 Apr
8-10 wk
21 Apr
8 Jun
1 wk after
6 May
29 May
3 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
23 Mar – 20 Apr
24 Apr
6-10 wk
1 Jun
5 Jun
7 wk after
California goldenpoppy
Eschscholzia californica
8 Apr
8 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
23 Mar – 6 Apr
9 May
8-10 wk
1 Jun
4 Jul
7 wk after
Water forget-me-not
Myosotis scorpioides
3 – 17 Feb
7 May
6-8 wk
31 Mar
18 Jun
2 wk before
25 Apr
8 Jun
1 wk after