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Method
Rel. frost
Last spring frost (0°C) 28 May Frost 1 of 10 years · 20 years of data
Frost-free season 142 days 28 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)
9 – 23 Apr
13 Jun
5-7 wk
28 May
18 Jul
0 wk
29 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
16 – 30 Apr
25 Jun
4-6 wk
28 May
23 Jul
0 wk
29 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
16 Mar – 13 Apr
8-12 wk
8 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
9 – 23 Apr
8 Jun
5-7 wk
28 May
13 Jul
0 wk
28 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
20 – 27 May
3-4 wk
17 Jun
3 wk after
Florence Fennel
Foeniculum vulgare
27 May – 3 Jun
5 Jun
4-5 wk
1 Jul
3 Jul
5 wk after
10 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
10 – 17 Jun
3-4 wk
8 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
5 Mar – 2 Apr
29 Mar
8-12 wk
28 May
0 wk
10 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
29 May
13 Jun
0 wk
29 May
3 Jun
0 wk
Maize
Zea mays
Fleece
11 – 18 May
3-4 wk
8 Jun
2 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
6 – 13 May
2 Jul
3-4 wk
3 Jun
23 Jul
1 wk after
10 Jun
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
28 May
3 Jul
0 wk
28 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
9 – 23 Apr
8 Jun
5-7 wk
28 May
13 Jul
0 wk
28 May
3 Jul
0 wk
Potato
Solanum tuberosum
26 Apr – 10 May
5 Jun
4-6 wk
7 Jun
3 Jul
1 wk after
7 Jun
23 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
9 – 23 Apr
18 Jun
5-7 wk
28 May
23 Jul
0 wk
29 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
20 – 27 May
6 Jun
3-4 wk
17 Jun
27 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
6 – 13 May
17 Jun
3-4 wk
3 Jun
8 Jul
1 wk after
10 Jun
28 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
16 – 30 Apr
20 Jun
4-6 wk
28 May
18 Jul
0 wk
Lettuce
Lactuca sativa
30 Apr – 7 May
7 Jul
3-4 wk
28 May
28 Jul
0 wk
29 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
16 – 30 Apr
20 Jun
4-6 wk
28 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
30 Apr – 14 May
30 May
2-4 wk
28 May
13 Jun
0 wk
28 May
3 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
29 May
13 Jun
0 wk
29 May
3 Jun
0 wk
Spinach
Spinacia oleracea
30 Apr – 7 May
22 Jul
3-4 wk
28 May
12 Aug
0 wk
25 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
22 Jun – 6 Jul
4-6 wk
3 Aug
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
13 – 27 Apr
6-8 wk
8 Jun
2 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
20 May – 3 Jun
2-4 wk
17 Jun
3 wk after
10 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
16 – 30 Apr
20 Jun
4-6 wk
28 May
18 Jul
0 wk
Garden pea
Pisum sativum
30 Apr – 7 May
22 Jun
3-4 wk
28 May
13 Jul
0 wk
29 May
3 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
Fleece
6 – 20 May
15 May
4-6 wk
17 Jun
3 wk after
Lemon balm
Melissa officinalis
19 Mar – 2 Apr
18 May
8-10 wk
28 May
13 Jul
0 wk
22 Jun
3 Jul
4 wk after
Dill
Anethum graveolens
29 May
23 Jul
0 wk
Wild chives
Allium schoenoprasum
2 – 16 Apr
1 Jun
6-8 wk
28 May
13 Jul
0 wk
29 May
3 Jul
0 wk
Spearmint
Mentha spicata
5 Mar – 2 Apr
18 May
8-12 wk
28 May
13 Jul
0 wk
22 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
28 May
12 Aug
0 wk
10 Jun
2 Aug
2 wk after
Garden sage
Salvia officinalis
25 Mar – 8 Apr
3 May
8-10 wk
3 Jun
28 Jun
1 wk after
Common thyme
Thymus vulgaris
19 Mar – 2 Apr
8 May
8-10 wk
28 May
3 Jul
0 wk
Oregano
Origanum vulgare
2 – 16 Apr
22 May
6-8 wk
28 May
3 Jul
0 wk
22 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
2 – 16 Apr
22 May
6-8 wk
28 May
3 Jul
0 wk
29 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
25 Feb – 25 Mar
4 Apr
10-14 wk
3 Jun
13 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
Fleece
20 – 27 May
22 May
3-4 wk
17 Jun
3 wk after
Cornflower
Centaurea cyanus
28 May
13 Jul
0 wk
29 May
3 Jul
0 wk
Statice
Limonium sinuatum
8 – 22 Apr
8-10 wk
17 Jun
3 wk after
Sweet William
Dianthus barbatus
2 – 16 Apr
6-8 wk
28 May
0 wk
7 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
22 Apr – 6 May
6-8 wk
17 Jun
3 wk after
3 Aug
10 wk after
Pinnate dahlia
Dahlia × pinnata
17 Apr – 1 May
1 May
6-8 wk
12 Jun
12 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
15 Apr – 13 May
26 May
4-8 wk
10 Jun
23 Jun
2 wk after
10 Jun
13 Jun
2 wk after
Foxglove
Digitalis purpurea
19 Mar – 2 Apr
8-10 wk
28 May
0 wk
10 Jun
2 wk after
Busy lizzie
Impatiens walleriana
8 Apr – 6 May
2 Jun
8-12 wk
1 Jul
28 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
22 Apr – 6 May
1 May
6-8 wk
17 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
6 – 20 May
4-6 wk
17 Jun
3 wk after
Chinese lantern
Physalis alkekengi
25 Mar – 8 Apr
18 Apr
8-10 wk
3 Jun
13 Jun
1 wk after
Love in a mist
Nigella damascena
28 May
28 Jun
0 wk
29 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
22 Apr – 6 May
6-8 wk
17 Jun
3 wk after
3 Aug
10 wk after
Purple-top vervain
Verbena bonariensis
11 Mar – 8 Apr
18 Apr
8-12 wk
3 Jun
13 Jun
1 wk after
Cardoon
Cynara cardunculus
25 Mar – 22 Apr
8-12 wk
17 Jun
3 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
25 Mar – 22 Apr
7 Apr
8-12 wk
17 Jun
3 wk after
Globe amaranth
Gomphrena globosa
Fleece
22 Apr – 6 May
6-8 wk
17 Jun
3 wk after
Corn poppy
Papaver rhoeas
28 May
13 Jul
0 wk
29 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
5 Mar – 2 Apr
8 May
8-12 wk
28 May
3 Jul
0 wk
7 Jun
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
22 Apr – 6 May
8-10 wk
1 Jul
5 wk after
Sweet pea
Lathyrus odoratus
2 – 23 Apr
29 May
5-8 wk
28 May
3 Jul
0 wk
Stock
Matthiola incana
2 – 16 Apr
1 Jun
6-8 wk
28 May
13 Jul
0 wk
10 Jun
3 Jul
2 wk after
Wormwood
Artemisia absinthium
2 – 16 Apr
2 May
6-8 wk
28 May
13 Jun
0 wk
10 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
6 – 20 May
4-6 wk
17 Jun
3 wk after
Garden pansy
Viola × wittrockiana
19 Mar – 2 Apr
18 May
8-10 wk
28 May
13 Jul
0 wk
7 Jun
3 Jul
1 wk after
Petunia
Petunia
25 Mar – 22 Apr
7 Apr
8-12 wk
17 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
8 – 22 Apr
2 May
6-8 wk
3 Jun
13 Jun
1 wk after
10 Jul
6 wk after
Common zinnia
Zinnia elegans
6 – 20 May
15 May
4-6 wk
17 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
13 – 27 May
22 May
3-5 wk
17 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
6 – 20 May
15 May
4-6 wk
17 Jun
3 wk after
10 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
8 Apr – 6 May
7 May
8-12 wk
1 Jul
2 Jul
5 wk after
Bee balm
Monarda didyma
5 Mar – 2 Apr
18 Apr
8-12 wk
28 May
13 Jun
0 wk
22 Jun
4 wk after
Yarrow
Achillea millefolium
2 – 16 Apr
2 Apr
6-8 wk
28 May
0 wk
10 Jun
2 wk after
Safflower
Carthamus tinctorius
28 May
13 Jun
0 wk
29 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
2 – 16 Apr
22 May
6-8 wk
28 May
3 Jul
0 wk
12 May
23 Jun
2 wk before
Bishop's flower
Ammi majus
16 – 30 Apr
5 Jun
4-6 wk
28 May
3 Jul
0 wk
10 Jun
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
25 Mar – 8 Apr
10-12 wk
17 Jun
3 wk after
Sunflower
Helianthus annuus
20 – 27 May
12 Jun
3-4 wk
17 Jun
3 Jul
3 wk after
22 Jun
23 Jun
4 wk after
China aster
Callistephus chinensis
22 Apr – 6 May
1 Jun
6-8 wk
17 Jun
13 Jul
3 wk after
10 Jul
6 wk after
Annual phlox
Phlox drummondii
13 – 27 Apr
1 May
6-8 wk
8 Jun
12 Jun
2 wk after
10 Jul
6 wk after
Hollyhock
Alcea rosea
2 – 16 Apr
6-8 wk
28 May
0 wk
10 Jun
2 wk after
Alpine delphinium
Delphinium elatum
5 Mar – 2 Apr
18 Apr
8-12 wk
28 May
13 Jun
0 wk
22 Jun
4 wk after
African marigold
Tagetes erecta
22 Apr – 6 May
1 May
6-8 wk
17 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
8 – 22 Apr
22 May
6-8 wk
3 Jun
3 Jul
1 wk after
10 Jul
6 wk after
Wood sage
Salvia nemorosa
19 Mar – 2 Apr
8 Apr
8-10 wk
28 May
3 Jun
0 wk
22 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
8 Apr – 6 May
1 May
6-10 wk
17 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
28 May
13 Jul
0 wk
29 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
8 – 22 Apr
8 May
8-10 wk
17 Jun
3 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
2 – 16 Apr
2 May
6-8 wk
28 May
13 Jun
0 wk
10 Jun
2 wk after