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Rel. frost
Last spring frost (0°C) 7 May Frost 3 of 4 years · 20 years of data
Frost-free season 141 days 7 May – 25 Sep
Probability that frost is over

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