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Rel. frost
Last spring frost (0°C) 25 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 156 days 25 Apr – 28 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 Apr
17 Jun
5-7 wk
24 May
22 Jul
4 wk after
18 Apr
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
28 Mar – 11 Apr
29 Jun
4-6 wk
9 May
27 Jul
2 wk after
18 Apr
17 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
7 Mar – 4 Apr
8-12 wk
30 May
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
10 – 24 Feb
12 Jun
5-7 wk
31 Mar
17 Jul
4 wk before
13 Apr
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
2 – 9 May
3-4 wk
30 May
5 wk after
Florence Fennel
Foeniculum vulgare
15 – 22 May
28 May
4-5 wk
19 Jun
25 Jun
8 wk after
31 May
15 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
24 – 31 May
3-4 wk
21 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
31 Jan – 28 Feb
31 Mar
8-12 wk
25 Apr
26 May
Vid frost
5 May
16 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
18 Apr
15 Jun
1 wk before
18 Apr
5 Jun
1 wk before
Maize
Zea mays
Greenhouse
19 – 26 Apr
3-4 wk
17 May
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Apr – 3 May
6 Jul
3-4 wk
24 May
27 Jul
4 wk after
5 May
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
13 Apr
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
10 – 24 Feb
12 Jun
5-7 wk
31 Mar
17 Jul
4 wk before
13 Apr
7 Jul
2 wk before
Potato
Solanum tuberosum
19 Mar – 2 Apr
31 May
4-6 wk
30 Apr
28 Jun
1 wk after
30 Apr
18 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
10 – 24 Feb
22 Jun
5-7 wk
31 Mar
27 Jul
4 wk before
18 Apr
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
Greenhouse
2 – 9 May
25 May
3-4 wk
30 May
15 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Apr – 3 May
9 Jun
3-4 wk
24 May
30 Jun
4 wk after
5 May
20 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
28 Mar – 11 Apr
24 Jun
4-6 wk
9 May
22 Jul
2 wk after
Lettuce
Lactuca sativa
21 – 28 Mar
11 Jul
3-4 wk
18 Apr
1 Aug
1 wk before
18 Apr
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
7 – 21 Mar
24 Jun
4-6 wk
18 Apr
22 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
16 – 30 Mar
3 Jun
2-4 wk
13 Apr
17 Jun
2 wk before
13 Apr
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
18 Apr
15 Jun
1 wk before
18 Apr
5 Jun
1 wk before
Spinach
Spinacia oleracea
13 – 20 Mar
26 Jul
3-4 wk
10 Apr
16 Aug
2 wk before
7 Apr
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
22 May – 5 Jun
4-6 wk
3 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
22 Mar – 5 Apr
28 Mar
6-8 wk
17 May
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
2 – 16 May
5 May
2-4 wk
30 May
5 wk after
16 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
28 Mar – 11 Apr
24 Jun
4-6 wk
9 May
22 Jul
2 wk after
Garden pea
Pisum sativum
13 – 20 Mar
26 Jun
3-4 wk
10 Apr
17 Jul
2 wk before
18 Apr
7 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
Greenhouse
18 Apr – 2 May
3 May
4-6 wk
30 May
31 May
5 wk after
Lemon balm
Melissa officinalis
14 – 28 Feb
22 May
8-10 wk
25 Apr
17 Jul
Vid frost
16 May
7 Jul
3 wk after
Dill
Anethum graveolens
18 Apr
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
3 – 17 Feb
5 Jun
6-8 wk
31 Mar
17 Jul
4 wk before
18 Apr
7 Jul
1 wk before
Spearmint
Mentha spicata
16 Jan – 13 Feb
22 May
8-12 wk
10 Apr
17 Jul
2 wk before
16 May
7 Jul
3 wk after
Coriander
Coriandrum sativum
5 May
6 Aug
1 wk after
Garden sage
Salvia officinalis
15 – 29 Mar
7 May
8-10 wk
24 May
2 Jul
4 wk after
Common thyme
Thymus vulgaris
28 Feb – 14 Mar
12 May
8-10 wk
9 May
7 Jul
2 wk after
Oregano
Origanum vulgare
6 – 20 Mar
26 May
6-8 wk
1 May
7 Jul
1 wk after
16 May
27 Jun
3 wk after
Parsley
Petroselinum crispum
13 – 27 Feb
26 May
6-8 wk
10 Apr
7 Jul
2 wk before
18 Apr
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
15 Feb – 15 Mar
2 Apr
10-14 wk
24 May
11 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
Greenhouse
2 – 9 May
10 May
3-4 wk
30 May
31 May
5 wk after
Cornflower
Centaurea cyanus
10 Apr
17 Jul
2 wk before
18 Apr
7 Jul
1 wk before
Statice
Limonium sinuatum
Fleece
21 Mar – 4 Apr
2 Apr
8-10 wk
30 May
5 wk after
Sweet William
Dianthus barbatus
13 – 27 Feb
6-8 wk
10 Apr
2 wk before
30 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
4 – 18 Apr
16 Apr
6-8 wk
30 May
5 wk after
10 Jun
7 wk after
Pinnate dahlia
Dahlia × pinnata
10 – 24 Apr
6-8 wk
5 Jun
6 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
21 Mar – 18 Apr
23 Apr
4-8 wk
16 May
21 May
3 wk after
16 May
3 wk after
Foxglove
Digitalis purpurea
30 Jan – 13 Feb
8-10 wk
10 Apr
2 wk before
5 May
1 wk after
Busy lizzie
Impatiens walleriana
27 Mar – 24 Apr
29 Apr
8-12 wk
19 Jun
24 Jun
8 wk after
Creeping zinnia
Sanvitalia procumbens
16 – 30 Apr
18 Apr
6-8 wk
11 Jun
7 wk after
Hyacinth bean
Dolichos lablab
Season too short
30 Apr – 14 May
4-6 wk
11 Jun
7 wk after
Chinese lantern
Physalis alkekengi
15 – 29 Mar
22 Apr
8-10 wk
24 May
17 Jun
4 wk after
Love in a mist
Nigella damascena
18 Apr
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
Fleece
4 – 18 Apr
6 Apr
6-8 wk
30 May
5 wk after
10 Jun
7 wk after
Purple-top vervain
Verbena bonariensis
1 – 29 Mar
22 Apr
8-12 wk
24 May
17 Jun
4 wk after
Cardoon
Cynara cardunculus
Fleece
7 Mar – 4 Apr
23 Mar
8-12 wk
30 May
5 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
7 Mar – 4 Apr
26 Mar
8-12 wk
30 May
5 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
4 – 18 Apr
9 Apr
6-8 wk
30 May
5 wk after
Corn poppy
Papaver rhoeas
18 Apr
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
24 Jan – 21 Feb
12 May
8-12 wk
18 Apr
7 Jul
1 wk before
30 Apr
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
2 – 16 Apr
12 Apr
8-10 wk
11 Jun
7 wk after
Sweet pea
Lathyrus odoratus
13 Feb – 6 Mar
2 Jun
5-8 wk
10 Apr
7 Jul
2 wk before
Stock
Matthiola incana
21 Feb – 7 Mar
5 Jun
6-8 wk
18 Apr
17 Jul
1 wk before
5 May
7 Jul
1 wk after
Wormwood
Artemisia absinthium
13 – 27 Feb
6 May
6-8 wk
10 Apr
17 Jun
2 wk before
5 May
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
18 Apr – 2 May
18 Apr
4-6 wk
30 May
5 wk after
Garden pansy
Viola × wittrockiana
20 Jan – 3 Feb
22 May
8-10 wk
31 Mar
17 Jul
4 wk before
30 Apr
7 Jul
1 wk after
Petunia
Petunia
Fleece
7 Mar – 4 Apr
2 Apr
8-12 wk
30 May
5 wk after
Sweet Scabious
Scabiosa atropurpurea
29 Mar – 12 Apr
6 May
6-8 wk
24 May
17 Jun
4 wk after
31 May
7 Jun
5 wk after
Common zinnia
Zinnia elegans
Fleece
18 Apr – 2 May
3 May
4-6 wk
30 May
31 May
5 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
25 Apr – 9 May
10 May
3-5 wk
30 May
31 May
5 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
18 Apr – 2 May
19 May
4-6 wk
30 May
16 Jun
5 wk after
16 May
6 Jun
3 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
19 Mar – 16 Apr
25 Apr
8-12 wk
11 Jun
20 Jun
7 wk after
Bee balm
Monarda didyma
31 Jan – 28 Feb
22 Apr
8-12 wk
25 Apr
17 Jun
Vid frost
16 May
7 Jun
3 wk after
Yarrow
Achillea millefolium
13 – 27 Feb
6 Apr
6-8 wk
10 Apr
18 May
2 wk before
5 May
8 May
1 wk after
Safflower
Carthamus tinctorius
10 Apr
17 Jun
2 wk before
18 Apr
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
3 – 17 Feb
26 May
6-8 wk
31 Mar
7 Jul
4 wk before
13 Apr
27 Jun
2 wk before
Bishop's flower
Ammi majus
24 Mar – 7 Apr
9 Jun
4-6 wk
5 May
7 Jul
1 wk after
5 May
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
7 – 21 Mar
18 Mar
10-12 wk
30 May
5 wk after
Sunflower
Helianthus annuus
14 – 21 May
10 Jun
3-4 wk
11 Jun
1 Jul
7 wk after
16 May
21 Jun
3 wk after
China aster
Callistephus chinensis
16 – 30 Apr
30 May
6-8 wk
11 Jun
11 Jul
7 wk after
31 May
1 Jul
5 wk after
Annual phlox
Phlox drummondii
4 – 18 Apr
18 Apr
6-8 wk
30 May
30 May
5 wk after
31 May
5 wk after
Hollyhock
Alcea rosea
13 – 27 Feb
6-8 wk
10 Apr
2 wk before
5 May
1 wk after
Alpine delphinium
Delphinium elatum
14 Feb – 14 Mar
22 Apr
8-12 wk
9 May
17 Jun
2 wk after
16 May
7 Jun
3 wk after
African marigold
Tagetes erecta
16 – 30 Apr
18 Apr
6-8 wk
11 Jun
7 wk after
Black-eyed Susan
Rudbeckia hirta
29 Mar – 12 Apr
20 May
6-8 wk
24 May
1 Jul
4 wk after
31 May
21 Jun
5 wk after
Wood sage
Salvia nemorosa
20 Feb – 6 Mar
12 Apr
8-10 wk
1 May
7 Jun
1 wk after
16 May
28 May
3 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
21 Mar – 18 Apr
19 Apr
6-10 wk
30 May
31 May
5 wk after
California goldenpoppy
Eschscholzia californica
18 Apr
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
2 – 16 Apr
30 Apr
8-10 wk
11 Jun
25 Jun
7 wk after
Water forget-me-not
Myosotis scorpioides
13 – 27 Feb
6 May
6-8 wk
10 Apr
17 Jun
2 wk before
5 May
7 Jun
1 wk after