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Method
Rel. frost
Last spring frost (0°C) 30 May Frost 1 of 10 years · 20 years of data
Frost-free season 140 days 30 May – 17 Oct
Probability that frost is over

90% = 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)
11 – 25 Apr
14 Jun
5-7 wk
30 May
19 Jul
0 wk
31 May
9 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
18 Apr – 2 May
26 Jun
4-6 wk
30 May
24 Jul
0 wk
31 May
14 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
18 Mar – 15 Apr
8-12 wk
10 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
11 – 25 Apr
9 Jun
5-7 wk
30 May
14 Jul
0 wk
30 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
13 – 20 May
20 May
3-4 wk
10 Jun
10 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
29 May – 5 Jun
6 Jun
4-5 wk
3 Jul
4 Jul
5 wk after
12 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
12 – 19 Jun
3-4 wk
10 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
7 Mar – 4 Apr
30 Mar
8-12 wk
30 May
0 wk
12 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
31 May
14 Jun
0 wk
31 May
4 Jun
0 wk
Maize
Zea mays
Fleece
13 – 20 May
3-4 wk
10 Jun
2 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
8 – 15 May
3 Jul
3-4 wk
5 Jun
24 Jul
1 wk after
12 Jun
14 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
30 May
4 Jul
0 wk
30 May
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
11 – 25 Apr
9 Jun
5-7 wk
30 May
14 Jul
0 wk
30 May
4 Jul
0 wk
Potato
Solanum tuberosum
28 Apr – 12 May
5 Jun
4-6 wk
9 Jun
3 Jul
1 wk after
9 Jun
23 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
11 – 25 Apr
19 Jun
5-7 wk
30 May
24 Jul
0 wk
31 May
14 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
22 – 29 May
25 May
3-4 wk
19 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
8 – 15 May
18 Jun
3-4 wk
5 Jun
9 Jul
1 wk after
12 Jun
29 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
18 Apr – 2 May
21 Jun
4-6 wk
30 May
19 Jul
0 wk
Lettuce
Lactuca sativa
2 – 9 May
8 Jul
3-4 wk
30 May
29 Jul
0 wk
31 May
19 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
18 Apr – 2 May
21 Jun
4-6 wk
30 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
2 – 16 May
31 May
2-4 wk
30 May
14 Jun
0 wk
30 May
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
31 May
14 Jun
0 wk
31 May
4 Jun
0 wk
Spinach
Spinacia oleracea
2 – 9 May
23 Jul
3-4 wk
30 May
13 Aug
0 wk
27 May
3 Aug
0 wk
Sweet potato
Ipomoea batatas
24 Jun – 8 Jul
4-6 wk
5 Aug
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
15 – 29 Apr
6-8 wk
10 Jun
2 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
13 – 27 May
27 May
2-4 wk
10 Jun
10 Jun
2 wk after
24 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
18 Apr – 2 May
21 Jun
4-6 wk
30 May
19 Jul
0 wk
Garden pea
Pisum sativum
2 – 9 May
23 Jun
3-4 wk
30 May
14 Jul
0 wk
31 May
4 Jul
0 wk

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Greenhouse
29 Apr – 13 May
23 May
4-6 wk
10 Jun
20 Jun
2 wk after
Lemon balm
Melissa officinalis
21 Mar – 4 Apr
19 May
8-10 wk
30 May
14 Jul
0 wk
24 Jun
4 Jul
4 wk after
Dill
Anethum graveolens
31 May
24 Jul
0 wk
Wild chives
Allium schoenoprasum
4 – 18 Apr
2 Jun
6-8 wk
30 May
14 Jul
0 wk
31 May
4 Jul
0 wk
Spearmint
Mentha spicata
7 Mar – 4 Apr
19 May
8-12 wk
30 May
14 Jul
0 wk
24 Jun
4 Jul
4 wk after
Coriander
Coriandrum sativum
30 May
13 Aug
0 wk
12 Jun
3 Aug
2 wk after
Garden sage
Salvia officinalis
27 Mar – 10 Apr
4 May
8-10 wk
5 Jun
29 Jun
1 wk after
Common thyme
Thymus vulgaris
21 Mar – 4 Apr
9 May
8-10 wk
30 May
4 Jul
0 wk
Oregano
Origanum vulgare
4 – 18 Apr
23 May
6-8 wk
30 May
4 Jul
0 wk
24 Jun
24 Jun
4 wk after
Parsley
Petroselinum crispum
4 – 18 Apr
23 May
6-8 wk
30 May
4 Jul
0 wk
31 May
24 Jun
0 wk
Rosemary
Salvia rosmarinus
27 Feb – 27 Mar
5 Apr
10-14 wk
5 Jun
14 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
Greenhouse
13 – 20 May
30 May
3-4 wk
10 Jun
20 Jun
2 wk after
Cornflower
Centaurea cyanus
30 May
14 Jul
0 wk
31 May
4 Jul
0 wk
Statice
Limonium sinuatum
10 – 24 Apr
15 Apr
8-10 wk
19 Jun
3 wk after
Sweet William
Dianthus barbatus
4 – 18 Apr
6-8 wk
30 May
0 wk
9 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
24 Apr – 8 May
29 Apr
6-8 wk
19 Jun
3 wk after
5 Aug
10 wk after
Pinnate dahlia
Dahlia × pinnata
19 Apr – 3 May
29 Apr
6-8 wk
14 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
17 Apr – 15 May
22 May
4-8 wk
12 Jun
19 Jun
2 wk after
12 Jun
2 wk after
Foxglove
Digitalis purpurea
21 Mar – 4 Apr
8-10 wk
30 May
0 wk
12 Jun
2 wk after
Busy lizzie
Impatiens walleriana
10 Apr – 8 May
21 May
8-12 wk
3 Jul
16 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
24 Apr – 8 May
9 May
6-8 wk
19 Jun
20 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
8 – 22 May
4-6 wk
19 Jun
3 wk after
Chinese lantern
Physalis alkekengi
27 Mar – 10 Apr
19 Apr
8-10 wk
5 Jun
14 Jun
1 wk after
Love in a mist
Nigella damascena
30 May
29 Jun
0 wk
31 May
19 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
15 – 29 Apr
25 Apr
6-8 wk
10 Jun
2 wk after
19 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
13 Mar – 10 Apr
19 Apr
8-12 wk
5 Jun
14 Jun
1 wk after
Cardoon
Cynara cardunculus
27 Mar – 24 Apr
8-12 wk
19 Jun
3 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
18 Mar – 15 Apr
15 Apr
8-12 wk
10 Jun
10 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
15 – 29 Apr
29 Apr
6-8 wk
10 Jun
10 Jun
2 wk after
Corn poppy
Papaver rhoeas
30 May
14 Jul
0 wk
31 May
4 Jul
0 wk
Snapdragon
Antirrhinum majus
7 Mar – 4 Apr
9 May
8-12 wk
30 May
4 Jul
0 wk
9 Jun
24 Jun
1 wk after
Flossflower
Ageratum houstonianum
24 Apr – 8 May
25 Apr
8-10 wk
3 Jul
5 wk after
Sweet pea
Lathyrus odoratus
4 – 25 Apr
30 May
5-8 wk
30 May
4 Jul
0 wk
Stock
Matthiola incana
4 – 18 Apr
2 Jun
6-8 wk
30 May
14 Jul
0 wk
12 Jun
4 Jul
2 wk after
Wormwood
Artemisia absinthium
4 – 18 Apr
3 May
6-8 wk
30 May
14 Jun
0 wk
12 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
29 Apr – 13 May
8 May
4-6 wk
10 Jun
2 wk after
Garden pansy
Viola × wittrockiana
21 Mar – 4 Apr
19 May
8-10 wk
30 May
14 Jul
0 wk
9 Jun
4 Jul
1 wk after
Petunia
Petunia
27 Mar – 24 Apr
15 Apr
8-12 wk
19 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
10 – 24 Apr
3 May
6-8 wk
5 Jun
14 Jun
1 wk after
12 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
29 Apr – 13 May
23 May
4-6 wk
10 Jun
20 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
6 – 20 May
30 May
3-5 wk
10 Jun
20 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
8 – 22 May
13 May
4-6 wk
19 Jun
3 wk after
12 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
10 Apr – 8 May
25 Apr
8-12 wk
3 Jul
5 wk after
Bee balm
Monarda didyma
7 Mar – 4 Apr
19 Apr
8-12 wk
30 May
14 Jun
0 wk
24 Jun
4 wk after
Yarrow
Achillea millefolium
4 – 18 Apr
6-8 wk
30 May
0 wk
12 Jun
2 wk after
Safflower
Carthamus tinctorius
30 May
14 Jun
0 wk
31 May
4 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
4 – 18 Apr
23 May
6-8 wk
30 May
4 Jul
0 wk
14 May
24 Jun
2 wk before
Bishop's flower
Ammi majus
18 Apr – 2 May
6 Jun
4-6 wk
30 May
4 Jul
0 wk
12 Jun
24 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
18 Mar – 1 Apr
21 Mar
10-12 wk
10 Jun
2 wk after
Sunflower
Helianthus annuus
22 – 29 May
13 Jun
3-4 wk
19 Jun
4 Jul
3 wk after
24 Jun
24 Jun
4 wk after
China aster
Callistephus chinensis
24 Apr – 8 May
2 Jun
6-8 wk
19 Jun
14 Jul
3 wk after
12 Jul
6 wk after
Annual phlox
Phlox drummondii
15 – 29 Apr
9 May
6-8 wk
10 Jun
20 Jun
2 wk after
12 Jul
6 wk after
Hollyhock
Alcea rosea
4 – 18 Apr
6-8 wk
30 May
0 wk
12 Jun
2 wk after
Alpine delphinium
Delphinium elatum
7 Mar – 4 Apr
19 Apr
8-12 wk
30 May
14 Jun
0 wk
24 Jun
4 wk after
African marigold
Tagetes erecta
24 Apr – 8 May
9 May
6-8 wk
19 Jun
20 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
10 – 24 Apr
23 May
6-8 wk
5 Jun
4 Jul
1 wk after
12 Jul
6 wk after
Wood sage
Salvia nemorosa
21 Mar – 4 Apr
9 Apr
8-10 wk
30 May
4 Jun
0 wk
24 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
1 – 29 Apr
9 May
6-10 wk
10 Jun
20 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
30 May
14 Jul
0 wk
31 May
4 Jul
0 wk
Painted tongue
Salpiglossis sinuata
10 – 24 Apr
9 May
8-10 wk
19 Jun
4 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
4 – 18 Apr
3 May
6-8 wk
30 May
14 Jun
0 wk
12 Jun
2 wk after