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Method
Rel. frost
Last spring frost (0°C) 1 Jun Frost 1 of 10 years · 20 years of data
Frost-free season 147 days 1 Jun – 26 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)
13 – 27 Apr
8 Jun
5-7 wk
1 Jun
13 Jul
0 wk
2 Jun
3 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
20 Apr – 4 May
20 Jun
4-6 wk
1 Jun
18 Jul
0 wk
2 Jun
8 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
15 Mar – 12 Apr
8-12 wk
7 Jun
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
13 – 27 Apr
3 Jun
5-7 wk
1 Jun
8 Jul
0 wk
1 Jun
28 Jun
0 wk
Garden cucumber
Cucumis sativus
Season too short
10 – 17 May
14 May
3-4 wk
7 Jun
1 wk after
Florence Fennel
Foeniculum vulgare
29 May – 5 Jun
31 May
4-5 wk
3 Jul
5 wk after
14 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)
9 Mar – 6 Apr
24 Mar
8-12 wk
1 Jun
0 wk
14 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
2 Jun
8 Jun
0 wk
2 Jun
0 wk
Maize
Zea mays
Greenhouse
4 – 11 May
4 May
3-4 wk
1 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
6 – 13 May
27 Jun
3-4 wk
3 Jun
18 Jul
0 wk
14 Jun
8 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
1 Jun
28 Jun
0 wk
1 Jun
18 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
13 – 27 Apr
3 Jun
5-7 wk
1 Jun
8 Jul
0 wk
1 Jun
28 Jun
0 wk
Potato
Solanum tuberosum
30 Apr – 14 May
21 May
4-6 wk
11 Jun
18 Jun
1 wk after
11 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
13 – 27 Apr
13 Jun
5-7 wk
1 Jun
18 Jul
0 wk
2 Jun
8 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
10 – 17 May
20 Jun
3-4 wk
7 Jun
11 Jul
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
6 – 13 May
16 May
3-4 wk
3 Jun
6 Jun
0 wk
14 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
20 Apr – 4 May
15 Jun
4-6 wk
1 Jun
13 Jul
0 wk
Lettuce
Lactuca sativa
4 – 11 May
2 Jul
3-4 wk
1 Jun
23 Jul
0 wk
2 Jun
13 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
20 Apr – 4 May
15 Jun
4-6 wk
1 Jun
13 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
4 – 18 May
25 May
2-4 wk
1 Jun
8 Jun
0 wk
1 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
2 Jun
8 Jun
0 wk
2 Jun
0 wk
Spinach
Spinacia oleracea
4 – 11 May
17 Jul
3-4 wk
1 Jun
7 Aug
0 wk
29 May
28 Jul
0 wk
Sweet potato
Ipomoea batatas
26 Jun – 10 Jul
4-6 wk
7 Aug
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
6 – 20 Apr
13 Apr
6-8 wk
1 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
4 – 18 May
22 Jun
2-4 wk
1 Jun
6 Jul
0 wk
14 Jun
26 Jun
2 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
20 Apr – 4 May
15 Jun
4-6 wk
1 Jun
13 Jul
0 wk
Garden pea
Pisum sativum
4 – 11 May
17 Jun
3-4 wk
1 Jun
8 Jul
0 wk
2 Jun
28 Jun
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
29 May
4-6 wk
7 Jun
26 Jun
1 wk after
Lemon balm
Melissa officinalis
23 Mar – 6 Apr
13 May
8-10 wk
1 Jun
8 Jul
0 wk
26 Jun
28 Jun
4 wk after
Dill
Anethum graveolens
2 Jun
18 Jul
0 wk
Wild chives
Allium schoenoprasum
Season too short
6 – 20 Apr
27 May
6-8 wk
1 Jun
8 Jul
0 wk
23 May
28 Jun
1 wk before
Spearmint
Mentha spicata
9 Mar – 6 Apr
13 May
8-12 wk
1 Jun
8 Jul
0 wk
26 Jun
28 Jun
4 wk after
Coriander
Coriandrum sativum
1 Jun
7 Aug
0 wk
14 Jun
28 Jul
2 wk after
Garden sage
Salvia officinalis
25 Mar – 8 Apr
28 Apr
8-10 wk
3 Jun
23 Jun
0 wk
Common thyme
Thymus vulgaris
23 Mar – 6 Apr
3 May
8-10 wk
1 Jun
28 Jun
0 wk
Oregano
Origanum vulgare
6 – 20 Apr
17 May
6-8 wk
1 Jun
28 Jun
0 wk
26 Jun
4 wk after
Parsley
Petroselinum crispum
6 – 20 Apr
17 May
6-8 wk
1 Jun
28 Jun
0 wk
2 Jun
18 Jun
0 wk
Rosemary
Salvia rosmarinus
25 Feb – 25 Mar
30 Mar
10-14 wk
3 Jun
8 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
Greenhouse
10 – 17 May
5 Jun
3-4 wk
7 Jun
26 Jun
1 wk after
Cornflower
Centaurea cyanus
1 Jun
8 Jul
0 wk
2 Jun
28 Jun
0 wk
Statice
Limonium sinuatum
Fleece
29 Mar – 12 Apr
3 May
8-10 wk
7 Jun
28 Jun
1 wk after
Sweet William
Dianthus barbatus
6 – 20 Apr
6-8 wk
1 Jun
0 wk
11 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
12 – 26 Apr
17 May
6-8 wk
7 Jun
28 Jun
1 wk after
21 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
17 Apr – 1 May
5 May
6-8 wk
12 Jun
16 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Greenhouse
12 Apr – 10 May
31 May
4-8 wk
7 Jun
28 Jun
1 wk after
7 Jun
18 Jun
1 wk after
Foxglove
Digitalis purpurea
23 Mar – 6 Apr
8-10 wk
1 Jun
0 wk
14 Jun
2 wk after
Busy lizzie
Impatiens walleriana
Fleece
22 Mar – 19 Apr
16 Jun
8-12 wk
14 Jun
11 Aug
2 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
12 – 26 Apr
27 May
6-8 wk
7 Jun
8 Jul
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
3 – 17 May
4-6 wk
14 Jun
2 wk after
Chinese lantern
Physalis alkekengi
25 Mar – 8 Apr
13 Apr
8-10 wk
3 Jun
8 Jun
0 wk
Love in a mist
Nigella damascena
1 Jun
23 Jun
0 wk
2 Jun
13 Jun
0 wk
Strawflower
Xerochrysum bracteatum
Fleece
12 – 26 Apr
7 May
6-8 wk
7 Jun
18 Jun
1 wk after
21 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
11 Mar – 8 Apr
13 Apr
8-12 wk
3 Jun
8 Jun
0 wk
Cardoon
Cynara cardunculus
22 Mar – 19 Apr
8-12 wk
14 Jun
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
15 Mar – 12 Apr
21 Apr
8-12 wk
7 Jun
16 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
12 – 26 Apr
5 May
6-8 wk
7 Jun
16 Jun
1 wk after
Corn poppy
Papaver rhoeas
1 Jun
8 Jul
0 wk
2 Jun
28 Jun
0 wk
Snapdragon
Antirrhinum majus
9 Mar – 6 Apr
3 May
8-12 wk
1 Jun
28 Jun
0 wk
11 Jun
18 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
5 – 19 Apr
13 May
8-10 wk
14 Jun
8 Jul
2 wk after
Sweet pea
Lathyrus odoratus
6 – 27 Apr
24 May
5-8 wk
1 Jun
28 Jun
0 wk
Stock
Matthiola incana
6 – 20 Apr
27 May
6-8 wk
1 Jun
8 Jul
0 wk
14 Jun
28 Jun
2 wk after
Wormwood
Artemisia absinthium
6 – 20 Apr
27 Apr
6-8 wk
1 Jun
8 Jun
0 wk
14 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
26 Apr – 10 May
14 May
4-6 wk
7 Jun
11 Jun
1 wk after
Garden pansy
Viola × wittrockiana
23 Mar – 6 Apr
13 May
8-10 wk
1 Jun
8 Jul
0 wk
11 Jun
28 Jun
1 wk after
Petunia
Petunia
Fleece
15 Mar – 12 Apr
3 May
8-12 wk
7 Jun
28 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
8 – 22 Apr
27 Apr
6-8 wk
3 Jun
8 Jun
0 wk
14 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
26 Apr – 10 May
29 May
4-6 wk
7 Jun
26 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
3 – 17 May
5 Jun
3-5 wk
7 Jun
26 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
26 Apr – 10 May
31 May
4-6 wk
7 Jun
28 Jun
1 wk after
26 Jun
4 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
22 Mar – 19 Apr
21 May
8-12 wk
14 Jun
16 Jul
2 wk after
Bee balm
Monarda didyma
9 Mar – 6 Apr
13 Apr
8-12 wk
1 Jun
8 Jun
0 wk
26 Jun
4 wk after
Yarrow
Achillea millefolium
6 – 20 Apr
6-8 wk
1 Jun
0 wk
14 Jun
2 wk after
Safflower
Carthamus tinctorius
1 Jun
8 Jun
0 wk
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
6 – 20 Apr
17 May
6-8 wk
1 Jun
28 Jun
0 wk
16 May
18 Jun
2 wk before
Bishop's flower
Ammi majus
20 Apr – 4 May
31 May
4-6 wk
1 Jun
28 Jun
0 wk
14 Jun
18 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
15 – 29 Mar
30 Mar
10-12 wk
7 Jun
8 Jun
1 wk after
Sunflower
Helianthus annuus
17 – 24 May
7 Jun
3-4 wk
14 Jun
28 Jun
2 wk after
26 Jun
4 wk after
China aster
Callistephus chinensis
19 Apr – 3 May
27 May
6-8 wk
14 Jun
8 Jul
2 wk after
14 Jul
6 wk after
Annual phlox
Phlox drummondii
12 – 26 Apr
10 May
6-8 wk
7 Jun
21 Jun
1 wk after
14 Jul
6 wk after
Hollyhock
Alcea rosea
6 – 20 Apr
6-8 wk
1 Jun
0 wk
14 Jun
2 wk after
Alpine delphinium
Delphinium elatum
9 Mar – 6 Apr
13 Apr
8-12 wk
1 Jun
8 Jun
0 wk
26 Jun
4 wk after
African marigold
Tagetes erecta
Fleece
12 – 26 Apr
27 May
6-8 wk
7 Jun
8 Jul
1 wk after
Black-eyed Susan
Rudbeckia hirta
8 – 22 Apr
17 May
6-8 wk
3 Jun
28 Jun
0 wk
14 Jul
6 wk after
Wood sage
Salvia nemorosa
23 Mar – 6 Apr
3 Apr
8-10 wk
1 Jun
0 wk
26 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
29 Mar – 26 Apr
15 May
6-10 wk
7 Jun
26 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
1 Jun
8 Jul
0 wk
2 Jun
28 Jun
0 wk
Painted tongue
Salpiglossis sinuata
5 – 19 Apr
3 May
8-10 wk
14 Jun
28 Jun
2 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
6 – 20 Apr
27 Apr
6-8 wk
1 Jun
8 Jun
0 wk
1 Jun
0 wk