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Method
Rel. frost
Last spring frost (0°C) 24 May Frost 1 of 10 years · 20 years of data
Frost-free season 157 days 24 May – 28 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)
5 – 19 Apr
19 Jun
5-7 wk
24 May
24 Jul
0 wk
18 May
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
12 – 26 Apr
1 Jul
4-6 wk
24 May
29 Jul
0 wk
18 May
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
19 Mar – 16 Apr
1 Apr
8-12 wk
11 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
5 – 19 Apr
14 Jun
5-7 wk
24 May
19 Jul
0 wk
11 May
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
23 – 30 May
26 May
3-4 wk
20 Jun
4 wk after
Florence Fennel
Foeniculum vulgare
30 May – 6 Jun
11 Jun
4-5 wk
4 Jul
9 Jul
6 wk after
4 Jul
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
16 – 23 Jun
3-4 wk
14 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
1 – 29 Mar
4 Apr
8-12 wk
24 May
30 May
0 wk
6 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
18 May
19 Jun
1 wk before
18 May
9 Jun
1 wk before
Maize
Zea mays
Fleece
14 – 21 May
16 May
3-4 wk
11 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Apr – 3 May
8 Jul
3-4 wk
24 May
29 Jul
0 wk
6 Jun
19 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
24 May
9 Jul
0 wk
11 May
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
5 – 19 Apr
14 Jun
5-7 wk
24 May
19 Jul
0 wk
11 May
9 Jul
2 wk before
Potato
Solanum tuberosum
17 Apr – 1 May
11 Jun
4-6 wk
29 May
9 Jul
1 wk after
29 May
29 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
5 – 19 Apr
24 Jun
5-7 wk
24 May
29 Jul
0 wk
18 May
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
6 – 13 Jun
3-4 wk
4 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Apr – 3 May
8 Jul
3-4 wk
24 May
29 Jul
0 wk
6 Jun
19 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
12 – 26 Apr
26 Jun
4-6 wk
24 May
24 Jul
0 wk
Lettuce
Lactuca sativa
26 Apr – 3 May
13 Jul
3-4 wk
24 May
3 Aug
0 wk
18 May
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
12 – 26 Apr
26 Jun
4-6 wk
24 May
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
13 – 27 Apr
5 Jun
2-4 wk
11 May
19 Jun
2 wk before
11 May
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
18 May
19 Jun
1 wk before
18 May
9 Jun
1 wk before
Spinach
Spinacia oleracea
26 Apr – 3 May
28 Jul
3-4 wk
24 May
18 Aug
0 wk
4 May
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
25 Jun – 9 Jul
4-6 wk
6 Aug
11 wk after
Garden tomato
Solanum lycopersicum
Fleece
16 – 30 Apr
25 Apr
6-8 wk
11 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
23 May – 6 Jun
2 Jun
2-4 wk
20 Jun
4 wk after
4 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
12 – 26 Apr
26 Jun
4-6 wk
24 May
24 Jul
0 wk
Garden pea
Pisum sativum
26 Apr – 3 May
28 Jun
3-4 wk
24 May
19 Jul
0 wk
18 May
9 Jul
1 wk before

Herbs

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