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Method
Rel. frost
Last spring frost (0°C) 15 May Frost 1 of 4 years · 20 years of data
Frost-free season 148 days 15 May – 10 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)
25 Apr – 9 May
17 Jun
5-7 wk
13 Jun
22 Jul
4 wk after
8 May
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
17 Apr – 1 May
29 Jun
4-6 wk
29 May
27 Jul
2 wk after
8 May
17 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
27 Mar – 24 Apr
3 May
8-12 wk
19 Jun
28 Jun
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
2 – 16 Mar
12 Jun
5-7 wk
20 Apr
17 Jul
4 wk before
3 May
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
11 – 18 Jun
3-4 wk
9 Jul
8 wk after
Florence Fennel
Foeniculum vulgare
4 – 11 Jun
9 Jun
4-5 wk
9 Jul
8 wk after
20 Jun
27 Jun
5 wk after
Butter bean
Phaseolus lunatus
Fleece
16 – 23 Jun
3-4 wk
14 Jul
9 wk after
Onion
Allium cepa (Cepa-gruppen)
20 Feb – 20 Mar
2 Apr
8-12 wk
15 May
28 May
Vid frost
25 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
8 May
17 Jun
1 wk before
8 May
7 Jun
1 wk before
Maize
Zea mays
3 – 10 Jun
3-4 wk
1 Jul
7 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
16 – 23 May
6 Jul
3-4 wk
13 Jun
27 Jul
4 wk after
25 May
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
3 May
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
2 – 16 Mar
12 Jun
5-7 wk
20 Apr
17 Jul
4 wk before
3 May
7 Jul
2 wk before
Potato
Solanum tuberosum
8 – 22 Apr
9 Jun
4-6 wk
20 May
7 Jul
1 wk after
20 May
27 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
2 – 16 Mar
22 Jun
5-7 wk
20 Apr
27 Jul
4 wk before
8 May
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
11 – 18 Jun
2 Jul
3-4 wk
9 Jul
23 Jul
8 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
16 – 23 May
23 Jun
3-4 wk
13 Jun
14 Jul
4 wk after
25 May
4 Jul
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
17 Apr – 1 May
24 Jun
4-6 wk
29 May
22 Jul
2 wk after
Lettuce
Lactuca sativa
10 – 17 Apr
11 Jul
3-4 wk
8 May
1 Aug
1 wk before
8 May
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
27 Mar – 10 Apr
24 Jun
4-6 wk
8 May
22 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
5 – 19 Apr
3 Jun
2-4 wk
3 May
17 Jun
2 wk before
3 May
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
8 May
17 Jun
1 wk before
8 May
7 Jun
1 wk before
Spinach
Spinacia oleracea
2 – 9 Apr
26 Jul
3-4 wk
30 Apr
16 Aug
2 wk before
27 Apr
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
11 – 25 Jun
4-6 wk
23 Jul
10 wk after
Garden tomato
Solanum lycopersicum
6 – 20 May
10 May
6-8 wk
1 Jul
7 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
3 – 17 Jun
4 Jul
2-4 wk
1 Jul
18 Jul
7 wk after
20 Jun
8 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
17 Apr – 1 May
24 Jun
4-6 wk
29 May
22 Jul
2 wk after
Garden pea
Pisum sativum
2 – 9 Apr
26 Jun
3-4 wk
30 Apr
17 Jul
2 wk before
8 May
7 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
28 May – 11 Jun
10 Jun
4-6 wk
9 Jul
8 wk after
Lemon balm
Melissa officinalis
6 – 20 Mar
22 May
8-10 wk
15 May
17 Jul
Vid frost
5 Jun
7 Jul
3 wk after
Dill
Anethum graveolens
8 May
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
23 Feb – 9 Mar
5 Jun
6-8 wk
20 Apr
17 Jul
4 wk before
8 May
7 Jul
1 wk before
Spearmint
Mentha spicata
5 Feb – 5 Mar
22 May
8-12 wk
30 Apr
17 Jul
2 wk before
5 Jun
7 Jul
3 wk after
Coriander
Coriandrum sativum
25 May
6 Aug
1 wk after
Garden sage
Salvia officinalis
4 – 18 Apr
7 May
8-10 wk
13 Jun
2 Jul
4 wk after
Common thyme
Thymus vulgaris
20 Mar – 3 Apr
12 May
8-10 wk
29 May
7 Jul
2 wk after
Oregano
Origanum vulgare
26 Mar – 9 Apr
26 May
6-8 wk
21 May
7 Jul
1 wk after
5 Jun
27 Jun
3 wk after
Parsley
Petroselinum crispum
5 – 19 Mar
26 May
6-8 wk
30 Apr
7 Jul
2 wk before
8 May
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
7 Mar – 4 Apr
8 Apr
10-14 wk
13 Jun
17 Jun
4 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
11 – 18 Jun
17 Jun
3-4 wk
9 Jul
8 wk after
Cornflower
Centaurea cyanus
30 Apr
17 Jul
2 wk before
8 May
7 Jul
1 wk before
Statice
Limonium sinuatum
22 Apr – 6 May
10 May
8-10 wk
1 Jul
5 Jul
7 wk after
Sweet William
Dianthus barbatus
5 – 19 Mar
6-8 wk
30 Apr
2 wk before
20 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
6 – 20 May
24 May
6-8 wk
1 Jul
5 Jul
7 wk after
23 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
30 Apr – 14 May
26 May
6-8 wk
25 Jun
7 Jul
6 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
10 Apr – 8 May
9 Jun
4-8 wk
5 Jun
7 Jul
3 wk after
5 Jun
27 Jun
3 wk after
Foxglove
Digitalis purpurea
19 Feb – 5 Mar
8-10 wk
30 Apr
2 wk before
25 May
1 wk after
Busy lizzie
Impatiens walleriana
16 Apr – 14 May
30 Jun
8-12 wk
9 Jul
25 Aug
8 wk after
Creeping zinnia
Sanvitalia procumbens
6 – 20 May
3 Jun
6-8 wk
1 Jul
15 Jul
7 wk after
Hyacinth bean
Dolichos lablab
Season too short
20 May – 3 Jun
4-6 wk
1 Jul
7 wk after
Chinese lantern
Physalis alkekengi
4 – 18 Apr
22 Apr
8-10 wk
13 Jun
17 Jun
4 wk after
Love in a mist
Nigella damascena
8 May
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
6 – 20 May
14 May
6-8 wk
1 Jul
7 wk after
23 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
21 Mar – 18 Apr
22 Apr
8-12 wk
13 Jun
17 Jun
4 wk after
Cardoon
Cynara cardunculus
8 Apr – 6 May
8-12 wk
1 Jul
7 wk after
Regal-foxtail
Ptilotus nobilis
16 Apr – 14 May
3 May
8-12 wk
9 Jul
8 wk after
Globe amaranth
Gomphrena globosa
14 – 28 May
17 May
6-8 wk
9 Jul
8 wk after
Corn poppy
Papaver rhoeas
8 May
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
13 Feb – 13 Mar
12 May
8-12 wk
8 May
7 Jul
1 wk before
20 May
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
30 Apr – 14 May
20 May
8-10 wk
9 Jul
15 Jul
8 wk after
Sweet pea
Lathyrus odoratus
5 – 26 Mar
2 Jun
5-8 wk
30 Apr
7 Jul
2 wk before
Stock
Matthiola incana
13 – 27 Mar
5 Jun
6-8 wk
8 May
17 Jul
1 wk before
25 May
7 Jul
1 wk after
Wormwood
Artemisia absinthium
5 – 19 Mar
6 May
6-8 wk
30 Apr
17 Jun
2 wk before
25 May
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
28 May – 11 Jun
4-6 wk
9 Jul
8 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Feb
22 May
8-10 wk
20 Apr
17 Jul
4 wk before
20 May
7 Jul
1 wk after
Petunia
Petunia
8 Apr – 6 May
10 May
8-12 wk
1 Jul
5 Jul
7 wk after
Sweet Scabious
Scabiosa atropurpurea
18 Apr – 2 May
6 May
6-8 wk
13 Jun
17 Jun
4 wk after
20 Jun
5 wk after
Common zinnia
Zinnia elegans
20 May – 3 Jun
12 Jun
4-6 wk
1 Jul
10 Jul
7 wk after
Common morning glory
Ipomoea purpurea
4 – 18 Jun
17 Jun
3-5 wk
9 Jul
8 wk after
Garden cosmos
Cosmos bipinnatus
20 May – 3 Jun
9 Jun
4-6 wk
1 Jul
7 Jul
7 wk after
20 Jun
27 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
20 Apr – 18 May
2 Jun
8-12 wk
13 Jul
28 Jul
8 wk after
Bee balm
Monarda didyma
20 Feb – 20 Mar
22 Apr
8-12 wk
15 May
17 Jun
Vid frost
5 Jun
7 Jun
3 wk after
Yarrow
Achillea millefolium
5 – 19 Mar
6 Apr
6-8 wk
30 Apr
18 May
2 wk before
25 May
1 wk after
Safflower
Carthamus tinctorius
30 Apr
17 Jun
2 wk before
8 May
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
23 Feb – 9 Mar
26 May
6-8 wk
20 Apr
7 Jul
4 wk before
3 May
27 Jun
2 wk before
Bishop's flower
Ammi majus
13 – 27 Apr
9 Jun
4-6 wk
25 May
7 Jul
1 wk after
25 May
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Fleece
8 – 22 Apr
8 Apr
10-12 wk
1 Jul
7 wk after
Sunflower
Helianthus annuus
3 – 10 Jun
16 Jun
3-4 wk
1 Jul
7 Jul
7 wk after
5 Jun
27 Jun
3 wk after
China aster
Callistephus chinensis
6 – 20 May
5 Jun
6-8 wk
1 Jul
17 Jul
7 wk after
20 Jun
7 Jul
5 wk after
Annual phlox
Phlox drummondii
24 Apr – 8 May
3 Jun
6-8 wk
19 Jun
15 Jul
5 wk after
20 Jun
5 Jul
5 wk after
Hollyhock
Alcea rosea
5 – 19 Mar
6-8 wk
30 Apr
2 wk before
25 May
1 wk after
Alpine delphinium
Delphinium elatum
6 Mar – 3 Apr
22 Apr
8-12 wk
29 May
17 Jun
2 wk after
5 Jun
7 Jun
3 wk after
African marigold
Tagetes erecta
6 – 20 May
3 Jun
6-8 wk
1 Jul
15 Jul
7 wk after
Black-eyed Susan
Rudbeckia hirta
18 Apr – 2 May
26 May
6-8 wk
13 Jun
7 Jul
4 wk after
20 Jun
27 Jun
5 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
12 Apr
8-10 wk
21 May
7 Jun
1 wk after
5 Jun
3 wk after
Black-eyed susan vine
Thunbergia alata
30 Apr – 28 May
27 May
6-10 wk
9 Jul
8 wk after
California goldenpoppy
Eschscholzia californica
8 May
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
22 Apr – 6 May
12 May
8-10 wk
1 Jul
7 Jul
7 wk after
Water forget-me-not
Myosotis scorpioides
5 – 19 Mar
6 May
6-8 wk
30 Apr
17 Jun
2 wk before
25 May
7 Jun
1 wk after