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