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Rel. frost
Last spring frost (0°C) 3 May Frost 9 of 10 years · 20 years of data
Frost-free season 147 days 3 May – 27 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)
15 – 29 Mar
13 Jun
5-7 wk
3 May
18 Jul
0 wk
4 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
22 Mar – 5 Apr
25 Jun
4-6 wk
3 May
23 Jul
0 wk
4 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
21 Feb – 21 Mar
8-12 wk
16 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
15 – 29 Mar
8 Jun
5-7 wk
3 May
13 Jul
0 wk
3 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
18 – 25 Apr
6 May
3-4 wk
16 May
27 May
2 wk after
Florence Fennel
Foeniculum vulgare
4 – 11 May
29 May
4-5 wk
8 Jun
26 Jun
5 wk after
15 Jun
16 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
21 – 28 May
3-4 wk
18 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
8 Feb – 8 Mar
21 Mar
8-12 wk
3 May
16 May
0 wk
16 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
4 May
5 Jun
0 wk
4 May
26 May
0 wk
Maize
Zea mays
Greenhouse
5 – 12 Apr
26 Apr
3-4 wk
3 May
17 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
12 – 19 Apr
2 Jul
3-4 wk
10 May
23 Jul
1 wk after
16 May
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
3 May
3 Jul
0 wk
3 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
15 – 29 Mar
8 Jun
5-7 wk
3 May
13 Jul
0 wk
3 May
3 Jul
0 wk
Potato
Solanum tuberosum
1 – 15 Apr
19 May
4-6 wk
13 May
16 Jun
1 wk after
13 May
6 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
15 – 29 Mar
18 Jun
5-7 wk
3 May
23 Jul
0 wk
4 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
27 Apr – 4 May
11 May
3-4 wk
25 May
1 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
12 – 19 Apr
22 May
3-4 wk
10 May
12 Jun
1 wk after
16 May
2 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
22 Mar – 5 Apr
20 Jun
4-6 wk
3 May
18 Jul
0 wk
Lettuce
Lactuca sativa
5 – 12 Apr
7 Jul
3-4 wk
3 May
28 Jul
0 wk
4 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
22 Mar – 5 Apr
20 Jun
4-6 wk
3 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Apr
25 May
2-4 wk
3 May
8 Jun
0 wk
3 May
29 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
4 May
5 Jun
0 wk
4 May
26 May
0 wk
Spinach
Spinacia oleracea
5 – 12 Apr
22 Jul
3-4 wk
3 May
12 Aug
0 wk
30 Apr
2 Aug
0 wk
Sweet potato
Ipomoea batatas
28 May – 11 Jun
4-6 wk
9 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
8 – 22 Mar
5 Apr
6-8 wk
3 May
17 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
18 Apr – 2 May
13 May
2-4 wk
16 May
27 May
2 wk after
28 May
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
22 Mar – 5 Apr
20 Jun
4-6 wk
3 May
18 Jul
0 wk
Garden pea
Pisum sativum
5 – 12 Apr
22 Jun
3-4 wk
3 May
13 Jul
0 wk
4 May
3 Jul
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
4 – 18 Apr
7 May
4-6 wk
16 May
4 Jun
2 wk after
Lemon balm
Melissa officinalis
22 Feb – 8 Mar
18 May
8-10 wk
3 May
13 Jul
0 wk
28 May
3 Jul
4 wk after
Dill
Anethum graveolens
4 May
23 Jul
0 wk
Wild chives
Allium schoenoprasum
8 – 22 Mar
1 Jun
6-8 wk
3 May
13 Jul
0 wk
4 May
3 Jul
0 wk
Spearmint
Mentha spicata
8 Feb – 8 Mar
18 May
8-12 wk
3 May
13 Jul
0 wk
28 May
3 Jul
4 wk after
Coriander
Coriandrum sativum
3 May
12 Aug
0 wk
16 May
2 Aug
2 wk after
Garden sage
Salvia officinalis
1 – 15 Mar
3 May
8-10 wk
10 May
28 Jun
1 wk after
Common thyme
Thymus vulgaris
22 Feb – 8 Mar
8 May
8-10 wk
3 May
3 Jul
0 wk
Oregano
Origanum vulgare
8 – 22 Mar
22 May
6-8 wk
3 May
3 Jul
0 wk
28 May
23 Jun
4 wk after
Parsley
Petroselinum crispum
8 – 22 Mar
22 May
6-8 wk
3 May
3 Jul
0 wk
4 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
1 Feb – 1 Mar
1 Apr
10-14 wk
10 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
18 – 25 Apr
14 May
3-4 wk
16 May
4 Jun
2 wk after
Cornflower
Centaurea cyanus
3 May
13 Jul
0 wk
4 May
3 Jul
0 wk
Statice
Limonium sinuatum
Fleece
7 – 21 Mar
5 Apr
8-10 wk
16 May
31 May
2 wk after
Sweet William
Dianthus barbatus
8 – 22 Mar
6-8 wk
3 May
0 wk
13 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
21 Mar – 4 Apr
19 Apr
6-8 wk
16 May
31 May
2 wk after
22 Jun
7 wk after
Pinnate dahlia
Dahlia × pinnata
23 Mar – 6 Apr
13 Apr
6-8 wk
18 May
25 May
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
2 – 30 Apr
27 Apr
4-8 wk
28 May
4 wk after
28 May
4 wk after
Foxglove
Digitalis purpurea
22 Feb – 8 Mar
8-10 wk
3 May
0 wk
16 May
2 wk after
Busy lizzie
Impatiens walleriana
16 Mar – 13 Apr
7 May
8-12 wk
8 Jun
2 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
21 Mar – 4 Apr
29 Apr
6-8 wk
16 May
10 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
13 – 27 Apr
4-6 wk
25 May
3 wk after
Chinese lantern
Physalis alkekengi
1 – 15 Mar
18 Apr
8-10 wk
10 May
13 Jun
1 wk after
Love in a mist
Nigella damascena
3 May
28 Jun
0 wk
4 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
21 Mar – 4 Apr
9 Apr
6-8 wk
16 May
21 May
2 wk after
22 Jun
7 wk after
Purple-top vervain
Verbena bonariensis
15 Feb – 15 Mar
18 Apr
8-12 wk
10 May
13 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
21 Feb – 21 Mar
19 Mar
8-12 wk
16 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
21 Feb – 21 Mar
30 Mar
8-12 wk
16 May
25 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
21 Mar – 4 Apr
13 Apr
6-8 wk
16 May
25 May
2 wk after
Corn poppy
Papaver rhoeas
3 May
13 Jul
0 wk
4 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
8 Feb – 8 Mar
8 May
8-12 wk
3 May
3 Jul
0 wk
13 May
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
16 – 30 Mar
15 Apr
8-10 wk
25 May
10 Jun
3 wk after
Sweet pea
Lathyrus odoratus
8 – 29 Mar
29 May
5-8 wk
3 May
3 Jul
0 wk
Stock
Matthiola incana
8 – 22 Mar
1 Jun
6-8 wk
3 May
13 Jul
0 wk
16 May
3 Jul
2 wk after
Wormwood
Artemisia absinthium
8 – 22 Mar
2 May
6-8 wk
3 May
13 Jun
0 wk
16 May
3 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
4 – 18 Apr
22 Apr
4-6 wk
16 May
20 May
2 wk after
Garden pansy
Viola × wittrockiana
22 Feb – 8 Mar
18 May
8-10 wk
3 May
13 Jul
0 wk
13 May
3 Jul
1 wk after
Petunia
Petunia
Fleece
21 Feb – 21 Mar
5 Apr
8-12 wk
16 May
31 May
2 wk after
Sweet Scabious
Scabiosa atropurpurea
15 – 29 Mar
2 May
6-8 wk
10 May
13 Jun
1 wk after
15 Jun
6 wk after
Common zinnia
Zinnia elegans
Fleece
4 – 18 Apr
7 May
4-6 wk
16 May
4 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
11 – 25 Apr
14 May
3-5 wk
16 May
4 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
4 – 18 Apr
14 May
4-6 wk
16 May
11 Jun
2 wk after
28 May
1 Jun
4 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
16 Mar – 13 Apr
11 Apr
8-12 wk
8 Jun
5 wk after
Bee balm
Monarda didyma
8 Feb – 8 Mar
18 Apr
8-12 wk
3 May
13 Jun
0 wk
28 May
3 Jun
4 wk after
Yarrow
Achillea millefolium
8 – 22 Mar
2 Apr
6-8 wk
3 May
14 May
0 wk
16 May
2 wk after
Safflower
Carthamus tinctorius
3 May
13 Jun
0 wk
4 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
8 – 22 Mar
22 May
6-8 wk
3 May
3 Jul
0 wk
17 Apr
23 Jun
2 wk before
Bishop's flower
Ammi majus
22 Mar – 5 Apr
5 Jun
4-6 wk
3 May
3 Jul
0 wk
16 May
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
21 Feb – 7 Mar
13 Mar
10-12 wk
16 May
22 May
2 wk after
Sunflower
Helianthus annuus
27 Apr – 4 May
9 Jun
3-4 wk
25 May
30 Jun
3 wk after
28 May
20 Jun
4 wk after
China aster
Callistephus chinensis
30 Mar – 13 Apr
29 May
6-8 wk
25 May
10 Jul
3 wk after
15 Jun
30 Jun
6 wk after
Annual phlox
Phlox drummondii
21 Mar – 4 Apr
14 Apr
6-8 wk
16 May
26 May
2 wk after
15 Jun
6 wk after
Hollyhock
Alcea rosea
8 – 22 Mar
6-8 wk
3 May
0 wk
16 May
2 wk after
Alpine delphinium
Delphinium elatum
8 Feb – 8 Mar
18 Apr
8-12 wk
3 May
13 Jun
0 wk
28 May
3 Jun
4 wk after
African marigold
Tagetes erecta
Fleece
21 Mar – 4 Apr
29 Apr
6-8 wk
16 May
10 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
15 – 29 Mar
19 May
6-8 wk
10 May
30 Jun
1 wk after
15 Jun
20 Jun
6 wk after
Wood sage
Salvia nemorosa
22 Feb – 8 Mar
8 Apr
8-10 wk
3 May
3 Jun
0 wk
28 May
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
7 Mar – 4 Apr
23 Apr
6-10 wk
16 May
4 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
3 May
13 Jul
0 wk
4 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
16 – 30 Mar
1 May
8-10 wk
25 May
26 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
8 – 22 Mar
2 May
6-8 wk
3 May
13 Jun
0 wk
16 May
3 Jun
2 wk after