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Method
Rel. frost
Last spring frost (0°C) 18 May Frost 1 of 10 years · 20 years of data
Frost-free season 168 days 18 May – 2 Nov
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)
30 Mar – 13 Apr
14 Jun
5-7 wk
18 May
19 Jul
0 wk
22 May
9 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
6 – 20 Apr
26 Jun
4-6 wk
18 May
24 Jul
0 wk
22 May
14 Jul
1 wk after
Chili pepper
Capsicum annuum
Greenhouse
1 – 29 Mar
31 Mar
8-12 wk
24 May
26 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
30 Mar – 13 Apr
9 Jun
5-7 wk
18 May
14 Jul
0 wk
18 May
4 Jul
0 wk
Garden cucumber
Cucumis sativus
Fleece
3 – 10 May
25 May
3-4 wk
31 May
15 Jun
2 wk after
Florence Fennel
Foeniculum vulgare
15 – 22 May
6 Jun
4-5 wk
19 Jun
4 Jul
5 wk after
6 Jul
7 wk after
Butter bean
Phaseolus lunatus
Season too short
29 May – 5 Jun
3-4 wk
26 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
23 Feb – 23 Mar
30 Mar
8-12 wk
18 May
25 May
0 wk
8 Jun
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
22 May
14 Jun
1 wk after
22 May
4 Jun
1 wk after
Maize
Zea mays
Fleece
26 Apr – 3 May
15 May
3-4 wk
24 May
5 Jun
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
22 – 29 Apr
3 Jul
3-4 wk
20 May
24 Jul
0 wk
8 Jun
14 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
18 May
4 Jul
0 wk
18 May
24 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
30 Mar – 13 Apr
9 Jun
5-7 wk
18 May
14 Jul
0 wk
18 May
4 Jul
0 wk
Potato
Solanum tuberosum
22 Apr – 6 May
6 Jun
4-6 wk
3 Jun
4 Jul
2 wk after
3 Jun
24 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
30 Mar – 13 Apr
19 Jun
5-7 wk
18 May
24 Jul
0 wk
22 May
14 Jul
1 wk after
Pumpkin
Cucurbita pepo
22 – 29 May
30 May
3-4 wk
19 Jun
20 Jun
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
22 – 29 Apr
22 Jun
3-4 wk
20 May
13 Jul
0 wk
8 Jun
3 Jul
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
6 – 20 Apr
21 Jun
4-6 wk
18 May
19 Jul
0 wk
Lettuce
Lactuca sativa
20 – 27 Apr
8 Jul
3-4 wk
18 May
29 Jul
0 wk
22 May
19 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
6 – 20 Apr
21 Jun
4-6 wk
18 May
19 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
20 Apr – 4 May
31 May
2-4 wk
18 May
14 Jun
0 wk
18 May
4 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
22 May
14 Jun
1 wk after
22 May
4 Jun
1 wk after
Spinach
Spinacia oleracea
20 – 27 Apr
23 Jul
3-4 wk
18 May
13 Aug
0 wk
14 May
3 Aug
1 wk before
Sweet potato
Ipomoea batatas
19 Jun – 3 Jul
4-6 wk
31 Jul
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
29 Mar – 12 Apr
24 Apr
6-8 wk
24 May
5 Jun
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
3 – 17 May
1 Jun
2-4 wk
31 May
15 Jun
2 wk after
6 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
6 – 20 Apr
21 Jun
4-6 wk
18 May
19 Jul
0 wk
Garden pea
Pisum sativum
20 – 27 Apr
23 Jun
3-4 wk
18 May
14 Jul
0 wk
22 May
4 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
8 – 22 May
8 May
4-6 wk
19 Jun
5 wk after
Lemon balm
Melissa officinalis
9 – 23 Mar
19 May
8-10 wk
18 May
14 Jul
0 wk
22 Jun
4 Jul
5 wk after
Dill
Anethum graveolens
22 May
24 Jul
1 wk after
Wild chives
Allium schoenoprasum
23 Mar – 6 Apr
2 Jun
6-8 wk
18 May
14 Jul
0 wk
22 May
4 Jul
1 wk after
Spearmint
Mentha spicata
23 Feb – 23 Mar
19 May
8-12 wk
18 May
14 Jul
0 wk
22 Jun
4 Jul
5 wk after
Coriander
Coriandrum sativum
18 May
13 Aug
0 wk
8 Jun
3 Aug
3 wk after
Garden sage
Salvia officinalis
11 – 25 Mar
4 May
8-10 wk
20 May
29 Jun
0 wk
Common thyme
Thymus vulgaris
9 – 23 Mar
9 May
8-10 wk
18 May
4 Jul
0 wk
Oregano
Origanum vulgare
23 Mar – 6 Apr
23 May
6-8 wk
18 May
4 Jul
0 wk
22 Jun
24 Jun
5 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
23 May
6-8 wk
18 May
4 Jul
0 wk
22 May
24 Jun
1 wk after
Rosemary
Salvia rosmarinus
11 Feb – 11 Mar
5 Apr
10-14 wk
20 May
14 Jun
0 wk

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
22 – 29 May
3-4 wk
19 Jun
5 wk after
Cornflower
Centaurea cyanus
18 May
14 Jul
0 wk
22 May
4 Jul
1 wk after
Statice
Limonium sinuatum
22 Mar – 5 Apr
22 Apr
8-10 wk
31 May
17 Jun
2 wk after
Sweet William
Dianthus barbatus
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
3 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
5 – 19 Apr
6 May
6-8 wk
31 May
17 Jun
2 wk after
31 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
3 – 17 Apr
13 May
6-8 wk
29 May
24 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
27 Apr – 25 May
27 May
4-8 wk
22 Jun
24 Jun
5 wk after
22 Jun
5 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
0 wk
8 Jun
3 wk after
Busy lizzie
Impatiens walleriana
27 Mar – 24 Apr
12 Jun
8-12 wk
19 Jun
7 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
5 – 19 Apr
16 May
6-8 wk
31 May
27 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
19 Apr – 3 May
25 Apr
4-6 wk
31 May
2 wk after
Chinese lantern
Physalis alkekengi
11 – 25 Mar
19 Apr
8-10 wk
20 May
14 Jun
0 wk
Love in a mist
Nigella damascena
18 May
29 Jun
0 wk
22 May
19 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
5 – 19 Apr
26 Apr
6-8 wk
31 May
7 Jun
2 wk after
31 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
25 Feb – 25 Mar
19 Apr
8-12 wk
20 May
14 Jun
0 wk
Cardoon
Cynara cardunculus
8 Mar – 5 Apr
20 Mar
8-12 wk
31 May
2 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
8 Mar – 5 Apr
17 Apr
8-12 wk
31 May
12 Jun
2 wk after
Globe amaranth
Gomphrena globosa
Fleece
5 – 19 Apr
1 May
6-8 wk
31 May
12 Jun
2 wk after
Corn poppy
Papaver rhoeas
18 May
14 Jul
0 wk
22 May
4 Jul
1 wk after
Snapdragon
Antirrhinum majus
23 Feb – 23 Mar
9 May
8-12 wk
18 May
4 Jul
0 wk
3 Jun
24 Jun
2 wk after
Flossflower
Ageratum houstonianum
10 – 24 Apr
2 May
8-10 wk
19 Jun
27 Jun
5 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
30 May
5-8 wk
18 May
4 Jul
0 wk
Stock
Matthiola incana
23 Mar – 6 Apr
2 Jun
6-8 wk
18 May
14 Jul
0 wk
8 Jun
4 Jul
3 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
3 May
6-8 wk
18 May
14 Jun
0 wk
8 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
19 Apr – 3 May
10 May
4-6 wk
31 May
7 Jun
2 wk after
Garden pansy
Viola × wittrockiana
9 – 23 Mar
19 May
8-10 wk
18 May
14 Jul
0 wk
3 Jun
4 Jul
2 wk after
Petunia
Petunia
8 Mar – 5 Apr
22 Apr
8-12 wk
31 May
17 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
25 Mar – 8 Apr
3 May
6-8 wk
20 May
14 Jun
0 wk
6 Jul
7 wk after
Common zinnia
Zinnia elegans
19 Apr – 3 May
25 May
4-6 wk
31 May
22 Jun
2 wk after
Common morning glory
Ipomoea purpurea
15 – 29 May
15 May
3-5 wk
19 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
19 Apr – 3 May
27 May
4-6 wk
31 May
24 Jun
2 wk after
6 Jul
7 wk after
Scarlet milkweed
Asclepias curassavica
17 Apr – 15 May
30 Apr
8-12 wk
10 Jul
8 wk after
Bee balm
Monarda didyma
23 Feb – 23 Mar
19 Apr
8-12 wk
18 May
14 Jun
0 wk
22 Jun
5 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
3 Apr
6-8 wk
18 May
0 wk
8 Jun
3 wk after
Safflower
Carthamus tinctorius
18 May
14 Jun
0 wk
22 May
4 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
23 Mar – 6 Apr
23 May
6-8 wk
18 May
4 Jul
0 wk
30 Apr
24 Jun
3 wk before
Bishop's flower
Ammi majus
6 – 20 Apr
6 Jun
4-6 wk
18 May
4 Jul
0 wk
8 Jun
24 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Fleece
8 – 22 Mar
26 Mar
10-12 wk
31 May
4 Jun
2 wk after
Sunflower
Helianthus annuus
3 – 10 May
13 Jun
3-4 wk
31 May
4 Jul
2 wk after
22 Jun
24 Jun
5 wk after
China aster
Callistephus chinensis
5 – 19 Apr
2 Jun
6-8 wk
31 May
14 Jul
2 wk after
6 Jul
7 wk after
Annual phlox
Phlox drummondii
29 Mar – 12 Apr
16 May
6-8 wk
24 May
27 Jun
1 wk after
6 Jul
7 wk after
Hollyhock
Alcea rosea
23 Mar – 6 Apr
6-8 wk
18 May
0 wk
8 Jun
3 wk after
Alpine delphinium
Delphinium elatum
23 Feb – 23 Mar
19 Apr
8-12 wk
18 May
14 Jun
0 wk
22 Jun
5 wk after
African marigold
Tagetes erecta
5 – 19 Apr
16 May
6-8 wk
31 May
27 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
25 Mar – 8 Apr
23 May
6-8 wk
20 May
4 Jul
0 wk
6 Jul
7 wk after
Wood sage
Salvia nemorosa
9 – 23 Mar
9 Apr
8-10 wk
18 May
4 Jun
0 wk
22 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
10 Apr – 8 May
24 Apr
6-10 wk
19 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
18 May
14 Jul
0 wk
22 May
4 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
22 Mar – 5 Apr
9 May
8-10 wk
31 May
4 Jul
2 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
3 May
6-8 wk
18 May
14 Jun
0 wk
8 Jun
3 wk after