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Rel. frost
Last spring frost (0°C) 22 May Frost 1 of 4 years · 20 years of data
Frost-free season 144 days 22 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)
5 – 19 May
13 Jun
5-7 wk
23 Jun
18 Jul
5 wk after
23 May
8 Jul
Vid frost
Broccoli
Brassica oleracea (Italica-gruppen)
29 Apr – 13 May
25 Jun
4-6 wk
10 Jun
23 Jul
3 wk after
23 May
13 Jul
Vid frost
Chili pepper
Capsicum annuum
Greenhouse
2 – 30 Apr
19 Apr
8-12 wk
25 Jun
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
21 Mar – 4 Apr
8 Jun
5-7 wk
9 May
13 Jul
2 wk before
22 May
3 Jul
Vid frost
Garden cucumber
Cucumis sativus
10 – 17 Jun
3-4 wk
8 Jul
7 wk after
Florence Fennel
Foeniculum vulgare
3 – 10 Jun
5 Jun
4-5 wk
8 Jul
7 wk after
4 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
11 – 18 Jun
3-4 wk
9 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
27 Feb – 27 Mar
29 Mar
8-12 wk
22 May
24 May
Vid frost
4 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
23 May
13 Jun
Vid frost
23 May
3 Jun
Vid frost
Maize
Zea mays
4 – 11 Jun
3-4 wk
2 Jul
6 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 May – 2 Jun
2 Jul
3-4 wk
23 Jun
23 Jul
5 wk after
4 Jun
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
22 May
23 Jun
Vid frost
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
21 Mar – 4 Apr
8 Jun
5-7 wk
9 May
13 Jul
2 wk before
22 May
3 Jul
Vid frost
Potato
Solanum tuberosum
20 Apr – 4 May
1 Jun
4-6 wk
1 Jun
29 Jun
1 wk after
1 Jun
19 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
21 Mar – 4 Apr
18 Jun
5-7 wk
9 May
23 Jul
2 wk before
23 May
13 Jul
Vid frost
Pumpkin
Cucurbita pepo
10 – 17 Jun
18 Jun
3-4 wk
8 Jul
9 Jul
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 May – 2 Jun
16 Jun
3-4 wk
23 Jun
7 Jul
5 wk after
4 Jun
27 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
29 Apr – 13 May
20 Jun
4-6 wk
10 Jun
18 Jul
3 wk after
Lettuce
Lactuca sativa
19 – 26 Apr
7 Jul
3-4 wk
17 May
28 Jul
1 wk before
23 May
18 Jul
Vid frost
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
5 – 19 Apr
20 Jun
4-6 wk
17 May
18 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
24 Apr – 8 May
30 May
2-4 wk
22 May
13 Jun
Vid frost
22 May
3 Jun
Vid frost
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
23 May
13 Jun
Vid frost
23 May
3 Jun
Vid frost
Spinach
Spinacia oleracea
14 – 21 Apr
22 Jul
3-4 wk
12 May
12 Aug
1 wk before
19 May
2 Aug
Vid frost
Sweet potato
Ipomoea batatas
16 – 30 Jun
4-6 wk
28 Jul
10 wk after
Garden tomato
Solanum lycopersicum
7 – 21 May
7 May
6-8 wk
2 Jul
6 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
4 – 18 Jun
20 Jun
2-4 wk
2 Jul
4 Jul
6 wk after
4 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
29 Apr – 13 May
20 Jun
4-6 wk
10 Jun
18 Jul
3 wk after
Garden pea
Pisum sativum
14 – 21 Apr
22 Jun
3-4 wk
12 May
13 Jul
1 wk before
23 May
3 Jul
Vid frost

Herbs

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