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Method
Rel. frost
Last spring frost (0°C) 27 May Frost 1 of 10 years · 20 years of data
Frost-free season 140 days 27 May – 14 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)
8 – 22 Apr
13 Jun
5-7 wk
27 May
18 Jul
0 wk
28 May
8 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
15 – 29 Apr
25 Jun
4-6 wk
27 May
23 Jul
0 wk
28 May
13 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
15 Mar – 12 Apr
8-12 wk
7 Jun
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
8 – 22 Apr
8 Jun
5-7 wk
27 May
13 Jul
0 wk
27 May
3 Jul
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
10 – 17 May
3-4 wk
7 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
26 May – 2 Jun
5 Jun
4-5 wk
30 Jun
3 Jul
5 wk after
9 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
9 – 16 Jun
3-4 wk
7 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
4 Mar – 1 Apr
29 Mar
8-12 wk
27 May
0 wk
9 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
28 May
13 Jun
0 wk
28 May
3 Jun
0 wk
Maize
Zea mays
Greenhouse
3 – 10 May
3-4 wk
31 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
5 – 12 May
2 Jul
3-4 wk
2 Jun
23 Jul
1 wk after
9 Jun
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
27 May
3 Jul
0 wk
27 May
23 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
8 – 22 Apr
8 Jun
5-7 wk
27 May
13 Jul
0 wk
27 May
3 Jul
0 wk
Potato
Solanum tuberosum
25 Apr – 9 May
5 Jun
4-6 wk
6 Jun
3 Jul
1 wk after
6 Jun
23 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
8 – 22 Apr
18 Jun
5-7 wk
27 May
23 Jul
0 wk
28 May
13 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
19 – 26 May
3-4 wk
16 Jun
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
5 – 12 May
16 Jun
3-4 wk
2 Jun
7 Jul
1 wk after
9 Jun
27 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
15 – 29 Apr
20 Jun
4-6 wk
27 May
18 Jul
0 wk
Lettuce
Lactuca sativa
29 Apr – 6 May
7 Jul
3-4 wk
27 May
28 Jul
0 wk
28 May
18 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
15 – 29 Apr
20 Jun
4-6 wk
27 May
18 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
29 Apr – 13 May
30 May
2-4 wk
27 May
13 Jun
0 wk
27 May
3 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
28 May
13 Jun
0 wk
28 May
3 Jun
0 wk
Spinach
Spinacia oleracea
29 Apr – 6 May
22 Jul
3-4 wk
27 May
12 Aug
0 wk
24 May
2 Aug
0 wk
Sweet potato
Ipomoea batatas
21 Jun – 5 Jul
4-6 wk
2 Aug
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
5 – 19 Apr
6 Apr
6-8 wk
31 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
10 – 24 May
14 May
2-4 wk
7 Jun
2 wk after
21 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
15 – 29 Apr
20 Jun
4-6 wk
27 May
18 Jul
0 wk
Garden pea
Pisum sativum
29 Apr – 6 May
22 Jun
3-4 wk
27 May
13 Jul
0 wk
28 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
Greenhouse
26 Apr – 10 May
10 May
4-6 wk
7 Jun
7 Jun
2 wk after
Lemon balm
Melissa officinalis
18 Mar – 1 Apr
18 May
8-10 wk
27 May
13 Jul
0 wk
21 Jun
3 Jul
4 wk after
Dill
Anethum graveolens
28 May
23 Jul
0 wk
Wild chives
Allium schoenoprasum
1 – 15 Apr
1 Jun
6-8 wk
27 May
13 Jul
0 wk
28 May
3 Jul
0 wk
Spearmint
Mentha spicata
4 Mar – 1 Apr
18 May
8-12 wk
27 May
13 Jul
0 wk
21 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
27 May
12 Aug
0 wk
9 Jun
2 Aug
2 wk after
Garden sage
Salvia officinalis
24 Mar – 7 Apr
3 May
8-10 wk
2 Jun
28 Jun
1 wk after
Common thyme
Thymus vulgaris
18 Mar – 1 Apr
8 May
8-10 wk
27 May
3 Jul
0 wk
Oregano
Origanum vulgare
1 – 15 Apr
22 May
6-8 wk
27 May
3 Jul
0 wk
21 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
1 – 15 Apr
22 May
6-8 wk
27 May
3 Jul
0 wk
28 May
23 Jun
0 wk
Rosemary
Salvia rosmarinus
24 Feb – 24 Mar
4 Apr
10-14 wk
2 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
Greenhouse
10 – 17 May
17 May
3-4 wk
7 Jun
7 Jun
2 wk after
Cornflower
Centaurea cyanus
27 May
13 Jul
0 wk
28 May
3 Jul
0 wk
Statice
Limonium sinuatum
Fleece
29 Mar – 12 Apr
7 Apr
8-10 wk
7 Jun
2 wk after
Sweet William
Dianthus barbatus
1 – 15 Apr
6-8 wk
27 May
0 wk
6 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
12 – 26 Apr
21 Apr
6-8 wk
7 Jun
2 wk after
16 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
16 – 30 Apr
16 Apr
6-8 wk
11 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
14 Apr – 12 May
13 May
4-8 wk
9 Jun
10 Jun
2 wk after
9 Jun
2 wk after
Foxglove
Digitalis purpurea
18 Mar – 1 Apr
8-10 wk
27 May
0 wk
9 Jun
2 wk after
Busy lizzie
Impatiens walleriana
7 Apr – 5 May
8 May
8-12 wk
30 Jun
3 Jul
5 wk after
Creeping zinnia
Sanvitalia procumbens
21 Apr – 5 May
6-8 wk
16 Jun
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
5 – 19 May
4-6 wk
16 Jun
3 wk after
Chinese lantern
Physalis alkekengi
24 Mar – 7 Apr
18 Apr
8-10 wk
2 Jun
13 Jun
1 wk after
Love in a mist
Nigella damascena
27 May
28 Jun
0 wk
28 May
18 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
12 – 26 Apr
6-8 wk
7 Jun
2 wk after
16 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
10 Mar – 7 Apr
18 Apr
8-12 wk
2 Jun
13 Jun
1 wk after
Cardoon
Cynara cardunculus
Fleece
15 Mar – 12 Apr
19 Mar
8-12 wk
7 Jun
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
15 Mar – 12 Apr
2 Apr
8-12 wk
7 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
12 – 26 Apr
16 Apr
6-8 wk
7 Jun
2 wk after
Corn poppy
Papaver rhoeas
27 May
13 Jul
0 wk
28 May
3 Jul
0 wk
Snapdragon
Antirrhinum majus
4 Mar – 1 Apr
8 May
8-12 wk
27 May
3 Jul
0 wk
6 Jun
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
7 – 21 Apr
17 Apr
8-10 wk
16 Jun
3 wk after
Sweet pea
Lathyrus odoratus
1 – 22 Apr
29 May
5-8 wk
27 May
3 Jul
0 wk
Stock
Matthiola incana
1 – 15 Apr
1 Jun
6-8 wk
27 May
13 Jul
0 wk
9 Jun
3 Jul
2 wk after
Wormwood
Artemisia absinthium
1 – 15 Apr
2 May
6-8 wk
27 May
13 Jun
0 wk
9 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
26 Apr – 10 May
4-6 wk
7 Jun
2 wk after
Garden pansy
Viola × wittrockiana
18 Mar – 1 Apr
18 May
8-10 wk
27 May
13 Jul
0 wk
6 Jun
3 Jul
1 wk after
Petunia
Petunia
Fleece
15 Mar – 12 Apr
7 Apr
8-12 wk
7 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
7 – 21 Apr
2 May
6-8 wk
2 Jun
13 Jun
1 wk after
9 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
26 Apr – 10 May
10 May
4-6 wk
7 Jun
7 Jun
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
3 – 17 May
17 May
3-5 wk
7 Jun
7 Jun
2 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
26 Apr – 10 May
13 May
4-6 wk
7 Jun
10 Jun
2 wk after
21 Jun
4 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
7 Apr – 5 May
12 Apr
8-12 wk
30 Jun
5 wk after
Bee balm
Monarda didyma
4 Mar – 1 Apr
18 Apr
8-12 wk
27 May
13 Jun
0 wk
21 Jun
4 wk after
Yarrow
Achillea millefolium
1 – 15 Apr
2 Apr
6-8 wk
27 May
0 wk
9 Jun
2 wk after
Safflower
Carthamus tinctorius
27 May
13 Jun
0 wk
28 May
3 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
1 – 15 Apr
22 May
6-8 wk
27 May
3 Jul
0 wk
11 May
23 Jun
2 wk before
Bishop's flower
Ammi majus
15 – 29 Apr
5 Jun
4-6 wk
27 May
3 Jul
0 wk
9 Jun
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
15 – 29 Mar
10-12 wk
7 Jun
2 wk after
Sunflower
Helianthus annuus
19 – 26 May
12 Jun
3-4 wk
16 Jun
3 Jul
3 wk after
21 Jun
23 Jun
4 wk after
China aster
Callistephus chinensis
21 Apr – 5 May
1 Jun
6-8 wk
16 Jun
13 Jul
3 wk after
9 Jul
6 wk after
Annual phlox
Phlox drummondii
12 – 26 Apr
19 Apr
6-8 wk
7 Jun
2 wk after
9 Jul
6 wk after
Hollyhock
Alcea rosea
1 – 15 Apr
6-8 wk
27 May
0 wk
9 Jun
2 wk after
Alpine delphinium
Delphinium elatum
4 Mar – 1 Apr
18 Apr
8-12 wk
27 May
13 Jun
0 wk
21 Jun
4 wk after
African marigold
Tagetes erecta
21 Apr – 5 May
6-8 wk
16 Jun
3 wk after
Black-eyed Susan
Rudbeckia hirta
7 – 21 Apr
22 May
6-8 wk
2 Jun
3 Jul
1 wk after
9 Jul
6 wk after
Wood sage
Salvia nemorosa
18 Mar – 1 Apr
8 Apr
8-10 wk
27 May
3 Jun
0 wk
21 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
29 Mar – 26 Apr
26 Apr
6-10 wk
7 Jun
7 Jun
2 wk after
California goldenpoppy
Eschscholzia californica
27 May
13 Jul
0 wk
28 May
3 Jul
0 wk
Painted tongue
Salpiglossis sinuata
7 – 21 Apr
8 May
8-10 wk
16 Jun
3 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
1 – 15 Apr
2 May
6-8 wk
27 May
13 Jun
0 wk
9 Jun
2 wk after