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Rel. frost
Last spring frost (0°C) 27 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 157 days 27 Apr – 1 Oct
Probability that frost is over

10% = Half of years are frost-free by this date. More about frost & season →

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Vegetables

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