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