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Rel. frost
Last spring frost (0°C) 29 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 152 days 29 Apr – 28 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)
11 – 25 Mar
14 Jun
5-7 wk
29 Apr
19 Jul
0 wk
3 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
18 Mar – 1 Apr
26 Jun
4-6 wk
29 Apr
24 Jul
0 wk
3 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Season too short
19 Feb – 19 Mar
8-12 wk
14 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
11 – 25 Mar
9 Jun
5-7 wk
29 Apr
14 Jul
0 wk
29 Apr
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Season too short
16 – 23 Apr
3-4 wk
14 May
2 wk after
Florence Fennel
Foeniculum vulgare
7 – 14 May
2 Jun
4-5 wk
11 Jun
30 Jun
6 wk after
17 Jun
20 Jun
7 wk after
Butter bean
Phaseolus lunatus
Season too short
19 – 26 May
3-4 wk
16 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
4 Feb – 4 Mar
22 Mar
8-12 wk
29 Apr
17 May
0 wk
20 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
3 May
6 Jun
1 wk after
3 May
27 May
1 wk after
Maize
Zea mays
Season too short
2 – 9 Apr
3-4 wk
30 Apr
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
9 – 16 Apr
3 Jul
3-4 wk
7 May
24 Jul
1 wk after
20 May
14 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
29 Apr
4 Jul
0 wk
29 Apr
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
11 – 25 Mar
9 Jun
5-7 wk
29 Apr
14 Jul
0 wk
29 Apr
4 Jul
0 wk
Potato
Solanum tuberosum
3 – 17 Apr
16 May
4-6 wk
15 May
13 Jun
2 wk after
15 May
3 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
11 – 25 Mar
19 Jun
5-7 wk
29 Apr
24 Jul
0 wk
3 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
Greenhouse
16 – 23 Apr
2 Jun
3-4 wk
14 May
23 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
9 – 16 Apr
24 May
3-4 wk
7 May
14 Jun
1 wk after
20 May
4 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
18 Mar – 1 Apr
21 Jun
4-6 wk
29 Apr
19 Jul
0 wk
Lettuce
Lactuca sativa
1 – 8 Apr
8 Jul
3-4 wk
29 Apr
29 Jul
0 wk
3 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
18 Mar – 1 Apr
21 Jun
4-6 wk
29 Apr
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
1 – 15 Apr
25 May
2-4 wk
29 Apr
8 Jun
0 wk
29 Apr
29 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
3 May
6 Jun
1 wk after
3 May
27 May
1 wk after
Spinach
Spinacia oleracea
1 – 8 Apr
23 Jul
3-4 wk
29 Apr
13 Aug
0 wk
25 Apr
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
31 May – 14 Jun
4-6 wk
12 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Season too short
5 – 19 Mar
6-8 wk
30 Apr
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
2 – 16 Apr
4 Jun
2-4 wk
30 Apr
18 Jun
0 wk
20 May
8 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
18 Mar – 1 Apr
21 Jun
4-6 wk
29 Apr
19 Jul
0 wk
Garden pea
Pisum sativum
1 – 8 Apr
23 Jun
3-4 wk
29 Apr
14 Jul
0 wk
3 May
4 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
2 – 16 Apr
11 May
4-6 wk
14 May
8 Jun
2 wk after
Lemon balm
Melissa officinalis
18 Feb – 4 Mar
19 May
8-10 wk
29 Apr
14 Jul
0 wk
3 Jun
4 Jul
5 wk after
Dill
Anethum graveolens
3 May
24 Jul
1 wk after
Wild chives
Allium schoenoprasum
4 – 18 Mar
2 Jun
6-8 wk
29 Apr
14 Jul
0 wk
3 May
4 Jul
1 wk after
Spearmint
Mentha spicata
4 Feb – 4 Mar
19 May
8-12 wk
29 Apr
14 Jul
0 wk
3 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
29 Apr
13 Aug
0 wk
20 May
3 Aug
3 wk after
Garden sage
Salvia officinalis
26 Feb – 12 Mar
4 May
8-10 wk
7 May
29 Jun
1 wk after
Common thyme
Thymus vulgaris
18 Feb – 4 Mar
9 May
8-10 wk
29 Apr
4 Jul
0 wk
Oregano
Origanum vulgare
4 – 18 Mar
23 May
6-8 wk
29 Apr
4 Jul
0 wk
3 Jun
24 Jun
5 wk after
Parsley
Petroselinum crispum
4 – 18 Mar
23 May
6-8 wk
29 Apr
4 Jul
0 wk
3 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
29 Jan – 26 Feb
5 Apr
10-14 wk
7 May
14 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
16 – 23 Apr
18 May
3-4 wk
14 May
8 Jun
2 wk after
Cornflower
Centaurea cyanus
29 Apr
14 Jul
0 wk
3 May
4 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
5 – 19 Mar
7 Apr
8-10 wk
14 May
2 Jun
2 wk after
Sweet William
Dianthus barbatus
4 – 18 Mar
6-8 wk
29 Apr
0 wk
15 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
19 Mar – 2 Apr
21 Apr
6-8 wk
14 May
2 Jun
2 wk after
27 Jun
8 wk after
Pinnate dahlia
Dahlia × pinnata
23 Mar – 6 Apr
17 Apr
6-8 wk
18 May
29 May
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
8 Apr – 6 May
1 May
4-8 wk
3 Jun
5 wk after
3 Jun
5 wk after
Foxglove
Digitalis purpurea
18 Feb – 4 Mar
8-10 wk
29 Apr
0 wk
20 May
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
3 – 31 Mar
29 May
8-12 wk
26 May
24 Jul
4 wk after
Creeping zinnia
Sanvitalia procumbens
31 Mar – 14 Apr
10 Apr
6-8 wk
26 May
4 wk after
Hyacinth bean
Dolichos lablab
Season too short
14 – 28 Apr
4-6 wk
26 May
4 wk after
Chinese lantern
Physalis alkekengi
26 Feb – 12 Mar
19 Apr
8-10 wk
7 May
14 Jun
1 wk after
Love in a mist
Nigella damascena
29 Apr
29 Jun
0 wk
3 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
19 Mar – 2 Apr
11 Apr
6-8 wk
14 May
23 May
2 wk after
27 Jun
8 wk after
Purple-top vervain
Verbena bonariensis
12 Feb – 12 Mar
19 Apr
8-12 wk
7 May
14 Jun
1 wk after
Cardoon
Cynara cardunculus
3 – 31 Mar
20 Mar
8-12 wk
26 May
4 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
19 Feb – 19 Mar
3 Apr
8-12 wk
14 May
29 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
19 Mar – 2 Apr
17 Apr
6-8 wk
14 May
29 May
2 wk after
Corn poppy
Papaver rhoeas
29 Apr
14 Jul
0 wk
3 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
4 Feb – 4 Mar
9 May
8-12 wk
29 Apr
4 Jul
0 wk
15 May
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
17 – 31 Mar
17 Apr
8-10 wk
26 May
12 Jun
4 wk after
Sweet pea
Lathyrus odoratus
4 – 25 Mar
30 May
5-8 wk
29 Apr
4 Jul
0 wk
Stock
Matthiola incana
4 – 18 Mar
2 Jun
6-8 wk
29 Apr
14 Jul
0 wk
20 May
4 Jul
3 wk after
Wormwood
Artemisia absinthium
4 – 18 Mar
3 May
6-8 wk
29 Apr
14 Jun
0 wk
20 May
4 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
2 – 16 Apr
26 Apr
4-6 wk
14 May
24 May
2 wk after
Garden pansy
Viola × wittrockiana
18 Feb – 4 Mar
19 May
8-10 wk
29 Apr
14 Jul
0 wk
15 May
4 Jul
2 wk after
Petunia
Petunia
Fleece
19 Feb – 19 Mar
7 Apr
8-12 wk
14 May
2 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
12 – 26 Mar
3 May
6-8 wk
7 May
14 Jun
1 wk after
17 Jun
7 wk after
Common zinnia
Zinnia elegans
Fleece
2 – 16 Apr
11 May
4-6 wk
14 May
8 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
9 – 23 Apr
18 May
3-5 wk
14 May
8 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
14 – 28 Apr
1 May
4-6 wk
26 May
29 May
4 wk after
17 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
3 – 31 Mar
3 May
8-12 wk
26 May
28 Jun
4 wk after
Bee balm
Monarda didyma
4 Feb – 4 Mar
19 Apr
8-12 wk
29 Apr
14 Jun
0 wk
3 Jun
4 Jun
5 wk after
Yarrow
Achillea millefolium
4 – 18 Mar
3 Apr
6-8 wk
29 Apr
15 May
0 wk
20 May
3 wk after
Safflower
Carthamus tinctorius
29 Apr
14 Jun
0 wk
3 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
4 – 18 Mar
23 May
6-8 wk
29 Apr
4 Jul
0 wk
11 Apr
24 Jun
3 wk before
Bishop's flower
Ammi majus
18 Mar – 1 Apr
6 Jun
4-6 wk
29 Apr
4 Jul
0 wk
20 May
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
19 Feb – 5 Mar
16 Mar
10-12 wk
14 May
25 May
2 wk after
Sunflower
Helianthus annuus
28 Apr – 5 May
13 Jun
3-4 wk
26 May
4 Jul
4 wk after
3 Jun
24 Jun
5 wk after
China aster
Callistephus chinensis
31 Mar – 14 Apr
2 Jun
6-8 wk
26 May
14 Jul
4 wk after
17 Jun
4 Jul
7 wk after
Annual phlox
Phlox drummondii
19 Mar – 2 Apr
10 Apr
6-8 wk
14 May
22 May
2 wk after
17 Jun
7 wk after
Hollyhock
Alcea rosea
4 – 18 Mar
6-8 wk
29 Apr
0 wk
20 May
3 wk after
Alpine delphinium
Delphinium elatum
4 Feb – 4 Mar
19 Apr
8-12 wk
29 Apr
14 Jun
0 wk
3 Jun
4 Jun
5 wk after
African marigold
Tagetes erecta
31 Mar – 14 Apr
10 Apr
6-8 wk
26 May
4 wk after
Black-eyed Susan
Rudbeckia hirta
12 – 26 Mar
23 May
6-8 wk
7 May
4 Jul
1 wk after
17 Jun
24 Jun
7 wk after
Wood sage
Salvia nemorosa
18 Feb – 4 Mar
9 Apr
8-10 wk
29 Apr
4 Jun
0 wk
3 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
5 Mar – 2 Apr
27 Apr
6-10 wk
14 May
8 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
29 Apr
14 Jul
0 wk
3 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
17 – 31 Mar
5 May
8-10 wk
26 May
30 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
4 – 18 Mar
3 May
6-8 wk
29 Apr
14 Jun
0 wk
20 May
4 Jun
3 wk after