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Rel. frost
Last spring frost (0°C) 15 May Frost 1 of 4 years · 20 years of data
Frost-free season 151 days 15 May – 13 Oct
Probability that frost is over

75% = 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)
27 Mar – 10 Apr
16 Jun
5-7 wk
15 May
21 Jul
0 wk
8 May
11 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
3 – 17 Apr
28 Jun
4-6 wk
15 May
26 Jul
0 wk
8 May
16 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
5 Mar – 2 Apr
17 Apr
8-12 wk
28 May
12 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Mar – 10 Apr
11 Jun
5-7 wk
15 May
16 Jul
0 wk
3 May
6 Jul
2 wk before
Garden cucumber
Cucumis sativus
19 – 26 May
11 Jun
3-4 wk
16 Jun
2 Jul
5 wk after
Florence Fennel
Foeniculum vulgare
12 – 19 May
8 Jun
4-5 wk
16 Jun
6 Jul
5 wk after
20 Jun
26 Jun
5 wk after
Butter bean
Phaseolus lunatus
Fleece
19 – 26 Jun
3-4 wk
17 Jul
9 wk after
Onion
Allium cepa (Cepa-gruppen)
20 Feb – 20 Mar
1 Apr
8-12 wk
15 May
27 May
0 wk
25 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
8 May
16 Jun
1 wk before
8 May
6 Jun
1 wk before
Maize
Zea mays
30 Apr – 7 May
1 Jun
3-4 wk
28 May
22 Jun
2 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
19 – 26 Apr
5 Jul
3-4 wk
17 May
26 Jul
0 wk
25 May
16 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
15 May
6 Jul
0 wk
3 May
26 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Mar – 10 Apr
11 Jun
5-7 wk
15 May
16 Jul
0 wk
3 May
6 Jul
2 wk before
Potato
Solanum tuberosum
8 – 22 Apr
8 Jun
4-6 wk
20 May
6 Jul
1 wk after
20 May
26 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Mar – 10 Apr
21 Jun
5-7 wk
15 May
26 Jul
0 wk
8 May
16 Jul
1 wk before
Pumpkin
Cucurbita pepo
19 – 26 May
29 Jun
3-4 wk
16 Jun
20 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
19 – 26 Apr
22 Jun
3-4 wk
17 May
13 Jul
0 wk
25 May
3 Jul
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
3 – 17 Apr
23 Jun
4-6 wk
15 May
21 Jul
0 wk
Lettuce
Lactuca sativa
17 – 24 Apr
10 Jul
3-4 wk
15 May
31 Jul
0 wk
8 May
21 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
3 – 17 Apr
23 Jun
4-6 wk
15 May
21 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Apr
2 Jun
2-4 wk
3 May
16 Jun
2 wk before
3 May
6 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
8 May
16 Jun
1 wk before
8 May
6 Jun
1 wk before
Spinach
Spinacia oleracea
17 – 24 Apr
25 Jul
3-4 wk
15 May
15 Aug
0 wk
27 Apr
5 Aug
3 wk before
Sweet potato
Ipomoea batatas
11 – 25 Jun
4-6 wk
23 Jul
10 wk after
Garden tomato
Solanum lycopersicum
2 – 16 Apr
11 May
6-8 wk
28 May
22 Jun
2 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
30 Apr – 14 May
1 Jul
2-4 wk
28 May
15 Jul
2 wk after
20 Jun
5 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
3 – 17 Apr
23 Jun
4-6 wk
15 May
21 Jul
0 wk
Garden pea
Pisum sativum
17 – 24 Apr
25 Jun
3-4 wk
15 May
16 Jul
0 wk
8 May
6 Jul
1 wk before

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
5 – 19 May
7 Jun
4-6 wk
16 Jun
5 Jul
5 wk after
Lemon balm
Melissa officinalis
6 – 20 Mar
21 May
8-10 wk
15 May
16 Jul
0 wk
5 Jun
6 Jul
3 wk after
Dill
Anethum graveolens
8 May
26 Jul
1 wk before
Wild chives
Allium schoenoprasum
20 Mar – 3 Apr
4 Jun
6-8 wk
15 May
16 Jul
0 wk
8 May
6 Jul
1 wk before
Spearmint
Mentha spicata
20 Feb – 20 Mar
21 May
8-12 wk
15 May
16 Jul
0 wk
5 Jun
6 Jul
3 wk after
Coriander
Coriandrum sativum
15 May
15 Aug
0 wk
25 May
5 Aug
1 wk after
Garden sage
Salvia officinalis
8 – 22 Mar
6 May
8-10 wk
17 May
1 Jul
0 wk
Common thyme
Thymus vulgaris
6 – 20 Mar
11 May
8-10 wk
15 May
6 Jul
0 wk
Oregano
Origanum vulgare
20 Mar – 3 Apr
25 May
6-8 wk
15 May
6 Jul
0 wk
5 Jun
26 Jun
3 wk after
Parsley
Petroselinum crispum
20 Mar – 3 Apr
25 May
6-8 wk
15 May
6 Jul
0 wk
8 May
26 Jun
1 wk before
Rosemary
Salvia rosmarinus
8 Feb – 8 Mar
7 Apr
10-14 wk
17 May
16 Jun
0 wk

Annual flowers

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