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Rel. frost
Last spring frost (0°C) 28 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 148 days 28 Apr – 23 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)
10 – 24 Mar
16 Jun
5-7 wk
28 Apr
21 Jul
0 wk
2 May
11 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
17 – 31 Mar
28 Jun
4-6 wk
28 Apr
26 Jul
0 wk
2 May
16 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
16 Feb – 16 Mar
8-12 wk
11 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
10 – 24 Mar
11 Jun
5-7 wk
28 Apr
16 Jul
0 wk
28 Apr
6 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
13 – 20 Apr
3-4 wk
11 May
2 wk after
Florence Fennel
Foeniculum vulgare
29 Apr – 6 May
24 May
4-5 wk
3 Jun
21 Jun
5 wk after
16 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
16 – 23 May
3-4 wk
13 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
3 Feb – 3 Mar
12 Mar
8-12 wk
28 Apr
7 May
0 wk
19 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
2 May
27 May
1 wk after
2 May
17 May
1 wk after
Maize
Zea mays
Season too short
31 Mar – 7 Apr
3-4 wk
28 Apr
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
7 – 14 Apr
5 Jul
3-4 wk
5 May
26 Jul
1 wk after
19 May
16 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
28 Apr
6 Jul
0 wk
28 Apr
26 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
10 – 24 Mar
11 Jun
5-7 wk
28 Apr
16 Jul
0 wk
28 Apr
6 Jul
0 wk
Potato
Solanum tuberosum
2 – 16 Apr
6 May
4-6 wk
14 May
3 Jun
2 wk after
14 May
24 May
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
10 – 24 Mar
21 Jun
5-7 wk
28 Apr
26 Jul
0 wk
2 May
16 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
13 – 20 Apr
5 May
3-4 wk
11 May
26 May
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
7 – 14 Apr
3 May
3-4 wk
5 May
24 May
1 wk after
19 May
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
17 – 31 Mar
23 Jun
4-6 wk
28 Apr
21 Jul
0 wk
Lettuce
Lactuca sativa
31 Mar – 7 Apr
10 Jul
3-4 wk
28 Apr
31 Jul
0 wk
2 May
21 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
17 – 31 Mar
23 Jun
4-6 wk
28 Apr
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
31 Mar – 14 Apr
15 May
2-4 wk
28 Apr
29 May
0 wk
28 Apr
19 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
2 May
27 May
1 wk after
2 May
17 May
1 wk after
Spinach
Spinacia oleracea
31 Mar – 7 Apr
25 Jul
3-4 wk
28 Apr
15 Aug
0 wk
24 Apr
5 Aug
1 wk before
Sweet potato
Ipomoea batatas
30 May – 13 Jun
4-6 wk
11 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
3 – 17 Mar
6-8 wk
28 Apr
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
31 Mar – 14 Apr
7 May
2-4 wk
28 Apr
21 May
0 wk
19 May
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
17 – 31 Mar
23 Jun
4-6 wk
28 Apr
21 Jul
0 wk
Garden pea
Pisum sativum
31 Mar – 7 Apr
25 Jun
3-4 wk
28 Apr
16 Jul
0 wk
2 May
6 Jul
1 wk after

Herbs

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