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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 157 days 25 Apr – 29 Sep
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)
7 – 21 Mar
10 Jun
5-7 wk
25 Apr
15 Jul
0 wk
26 Apr
5 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
14 – 28 Mar
22 Jun
4-6 wk
25 Apr
20 Jul
0 wk
26 Apr
10 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
13 Feb – 13 Mar
8-12 wk
8 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
7 – 21 Mar
5 Jun
5-7 wk
25 Apr
10 Jul
0 wk
25 Apr
30 Jun
0 wk
Garden cucumber
Cucumis sativus
Season too short
10 – 17 Apr
10 Apr
3-4 wk
8 May
2 wk after
Florence Fennel
Foeniculum vulgare
26 Apr – 3 May
2 Jun
4-5 wk
31 May
30 Jun
5 wk after
7 Jun
20 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
13 – 20 May
3-4 wk
10 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
31 Jan – 28 Feb
20 Feb
8-12 wk
25 Apr
0 wk
8 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Fleece
22 Apr
24 May
0 wk
22 Apr
14 May
0 wk
Maize
Zea mays
Season too short
28 Mar – 4 Apr
31 Mar
3-4 wk
25 Apr
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
4 – 11 Apr
29 Jun
3-4 wk
2 May
20 Jul
1 wk after
8 May
10 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
25 Apr
30 Jun
0 wk
25 Apr
20 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
7 – 21 Mar
5 Jun
5-7 wk
25 Apr
10 Jul
0 wk
25 Apr
30 Jun
0 wk
Potato
Solanum tuberosum
Fleece
15 – 29 Mar
29 Apr
4-6 wk
26 Apr
27 May
0 wk
26 Apr
17 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
7 – 21 Mar
15 Jun
5-7 wk
25 Apr
20 Jul
0 wk
26 Apr
10 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
10 – 17 Apr
25 May
3-4 wk
8 May
15 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
4 – 11 Apr
24 Apr
3-4 wk
2 May
15 May
1 wk after
8 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
14 – 28 Mar
17 Jun
4-6 wk
25 Apr
15 Jul
0 wk
Lettuce
Lactuca sativa
28 Mar – 4 Apr
4 Jul
3-4 wk
25 Apr
25 Jul
0 wk
26 Apr
15 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
14 – 28 Mar
17 Jun
4-6 wk
25 Apr
15 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Fleece
22 Mar – 5 Apr
12 May
2-4 wk
19 Apr
26 May
1 wk before
19 Apr
16 May
1 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Fleece
22 Apr
24 May
0 wk
22 Apr
14 May
0 wk
Spinach
Spinacia oleracea
28 Mar – 4 Apr
19 Jul
3-4 wk
25 Apr
9 Aug
0 wk
22 Apr
30 Jul
0 wk
Sweet potato
Ipomoea batatas
20 May – 3 Jun
4-6 wk
1 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
28 Feb – 14 Mar
10 Mar
6-8 wk
25 Apr
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
28 Mar – 11 Apr
27 May
2-4 wk
25 Apr
10 Jun
0 wk
8 May
31 May
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
14 – 28 Mar
17 Jun
4-6 wk
25 Apr
15 Jul
0 wk
Garden pea
Pisum sativum
28 Mar – 4 Apr
19 Jun
3-4 wk
25 Apr
10 Jul
0 wk
26 Apr
30 Jun
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Greenhouse
27 Mar – 10 Apr
3 May
4-6 wk
8 May
31 May
2 wk after
Lemon balm
Melissa officinalis
14 – 28 Feb
15 May
8-10 wk
25 Apr
10 Jul
0 wk
20 May
30 Jun
4 wk after
Dill
Anethum graveolens
26 Apr
20 Jul
0 wk
Wild chives
Allium schoenoprasum
28 Feb – 14 Mar
29 May
6-8 wk
25 Apr
10 Jul
0 wk
26 Apr
30 Jun
0 wk
Spearmint
Mentha spicata
31 Jan – 28 Feb
15 May
8-12 wk
25 Apr
10 Jul
0 wk
20 May
30 Jun
4 wk after
Coriander
Coriandrum sativum
25 Apr
9 Aug
0 wk
8 May
30 Jul
2 wk after
Garden sage
Salvia officinalis
21 Feb – 7 Mar
30 Apr
8-10 wk
2 May
25 Jun
1 wk after
Common thyme
Thymus vulgaris
14 – 28 Feb
5 May
8-10 wk
25 Apr
30 Jun
0 wk
Oregano
Origanum vulgare
28 Feb – 14 Mar
19 May
6-8 wk
25 Apr
30 Jun
0 wk
20 May
20 Jun
4 wk after
Parsley
Petroselinum crispum
28 Feb – 14 Mar
19 May
6-8 wk
25 Apr
30 Jun
0 wk
26 Apr
20 Jun
0 wk
Rosemary
Salvia rosmarinus
24 Jan – 21 Feb
1 Apr
10-14 wk
2 May
10 Jun
1 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 Apr
10 May
3-4 wk
8 May
31 May
2 wk after
Cornflower
Centaurea cyanus
25 Apr
10 Jul
0 wk
26 Apr
30 Jun
0 wk
Statice
Limonium sinuatum
Fleece
27 Feb – 13 Mar
30 Mar
8-10 wk
8 May
25 May
2 wk after
Sweet William
Dianthus barbatus
28 Feb – 14 Mar
6-8 wk
25 Apr
0 wk
5 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
13 – 27 Mar
13 Apr
6-8 wk
8 May
25 May
2 wk after
14 Jun
7 wk after
Pinnate dahlia
Dahlia × pinnata
15 – 29 Mar
9 Apr
6-8 wk
10 May
21 May
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
6 Mar – 3 Apr
26 May
4-8 wk
1 May
23 Jun
1 wk after
1 May
13 Jun
1 wk after
Foxglove
Digitalis purpurea
14 – 28 Feb
8-10 wk
25 Apr
0 wk
8 May
2 wk after
Busy lizzie
Impatiens walleriana
Fleece
22 Feb – 22 Mar
21 May
8-12 wk
17 May
16 Jul
3 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
13 – 27 Mar
23 Apr
6-8 wk
8 May
4 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
5 – 19 Apr
4-6 wk
17 May
3 wk after
Chinese lantern
Physalis alkekengi
21 Feb – 7 Mar
15 Apr
8-10 wk
2 May
10 Jun
1 wk after
Love in a mist
Nigella damascena
25 Apr
25 Jun
0 wk
26 Apr
15 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
13 – 27 Mar
3 Apr
6-8 wk
8 May
15 May
2 wk after
14 Jun
7 wk after
Purple-top vervain
Verbena bonariensis
7 Feb – 7 Mar
15 Apr
8-12 wk
2 May
10 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
13 Feb – 13 Mar
16 Mar
8-12 wk
8 May
11 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
13 Feb – 13 Mar
26 Mar
8-12 wk
8 May
21 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
13 – 27 Mar
9 Apr
6-8 wk
8 May
21 May
2 wk after
Corn poppy
Papaver rhoeas
25 Apr
10 Jul
0 wk
26 Apr
30 Jun
0 wk
Snapdragon
Antirrhinum majus
31 Jan – 28 Feb
5 May
8-12 wk
25 Apr
30 Jun
0 wk
5 May
20 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
8 – 22 Mar
9 Apr
8-10 wk
17 May
4 Jun
3 wk after
Sweet pea
Lathyrus odoratus
28 Feb – 21 Mar
26 May
5-8 wk
25 Apr
30 Jun
0 wk
Stock
Matthiola incana
28 Feb – 14 Mar
29 May
6-8 wk
25 Apr
10 Jul
0 wk
8 May
30 Jun
2 wk after
Wormwood
Artemisia absinthium
28 Feb – 14 Mar
29 Apr
6-8 wk
25 Apr
10 Jun
0 wk
8 May
31 May
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
27 Mar – 10 Apr
18 Apr
4-6 wk
8 May
16 May
2 wk after
Garden pansy
Viola × wittrockiana
14 – 28 Feb
15 May
8-10 wk
25 Apr
10 Jul
0 wk
5 May
30 Jun
1 wk after
Petunia
Petunia
Fleece
13 Feb – 13 Mar
30 Mar
8-12 wk
8 May
25 May
2 wk after
Sweet Scabious
Scabiosa atropurpurea
7 – 21 Mar
29 Apr
6-8 wk
2 May
10 Jun
1 wk after
7 Jun
6 wk after
Common zinnia
Zinnia elegans
Fleece
27 Mar – 10 Apr
3 May
4-6 wk
8 May
31 May
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
3 – 17 Apr
10 May
3-5 wk
8 May
31 May
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
27 Mar – 10 Apr
28 Apr
4-6 wk
8 May
26 May
2 wk after
20 May
4 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
22 Feb – 22 Mar
25 Apr
8-12 wk
17 May
20 Jun
3 wk after
Bee balm
Monarda didyma
31 Jan – 28 Feb
15 Apr
8-12 wk
25 Apr
10 Jun
0 wk
20 May
31 May
4 wk after
Yarrow
Achillea millefolium
28 Feb – 14 Mar
30 Mar
6-8 wk
25 Apr
11 May
0 wk
8 May
2 wk after
Safflower
Carthamus tinctorius
25 Apr
10 Jun
0 wk
26 Apr
31 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
28 Feb – 14 Mar
19 May
6-8 wk
25 Apr
30 Jun
0 wk
9 Apr
20 Jun
2 wk before
Bishop's flower
Ammi majus
14 – 28 Mar
2 Jun
4-6 wk
25 Apr
30 Jun
0 wk
8 May
20 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
13 – 27 Feb
25 Feb
10-12 wk
8 May
2 wk after
Sunflower
Helianthus annuus
19 – 26 Apr
9 Jun
3-4 wk
17 May
30 Jun
3 wk after
20 May
20 Jun
4 wk after
China aster
Callistephus chinensis
22 Mar – 5 Apr
29 May
6-8 wk
17 May
10 Jul
3 wk after
7 Jun
30 Jun
6 wk after
Annual phlox
Phlox drummondii
13 – 27 Mar
12 Apr
6-8 wk
8 May
24 May
2 wk after
7 Jun
6 wk after
Hollyhock
Alcea rosea
28 Feb – 14 Mar
6-8 wk
25 Apr
0 wk
8 May
2 wk after
Alpine delphinium
Delphinium elatum
31 Jan – 28 Feb
15 Apr
8-12 wk
25 Apr
10 Jun
0 wk
20 May
31 May
4 wk after
African marigold
Tagetes erecta
Fleece
13 – 27 Mar
23 Apr
6-8 wk
8 May
4 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
7 – 21 Mar
19 May
6-8 wk
2 May
30 Jun
1 wk after
7 Jun
20 Jun
6 wk after
Wood sage
Salvia nemorosa
14 – 28 Feb
5 Apr
8-10 wk
25 Apr
31 May
0 wk
20 May
21 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
27 Feb – 27 Mar
19 Apr
6-10 wk
8 May
31 May
2 wk after
California goldenpoppy
Eschscholzia californica
25 Apr
10 Jul
0 wk
26 Apr
30 Jun
0 wk
Painted tongue
Salpiglossis sinuata
8 – 22 Mar
5 May
8-10 wk
17 May
30 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
28 Feb – 14 Mar
29 Apr
6-8 wk
25 Apr
10 Jun
0 wk
8 May
31 May
2 wk after