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Method
Rel. frost
Last spring frost (0°C) 30 Jun Frost 1 of 10 years · 20 years of data
Frost-free season 148 days 30 Jun – 25 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)
12 – 26 May
5 Jun
5-7 wk
30 Jun
10 Jul
0 wk
1 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
19 May – 2 Jun
17 Jun
4-6 wk
30 Jun
15 Jul
0 wk
1 Jul
5 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
13 Apr – 11 May
30 Apr
8-12 wk
6 Jul
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
Season too short
12 – 26 May
31 May
5-7 wk
30 Jun
5 Jul
0 wk
14 Jun
25 Jun
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
8 – 15 Jun
24 Jun
3-4 wk
6 Jul
15 Jul
1 wk after
Florence Fennel
Foeniculum vulgare
Fleece
8 – 15 Jun
4-5 wk
13 Jul
2 wk after
25 Jul
4 wk after
Butter bean
Phaseolus lunatus
Season too short
11 – 18 Jul
3-4 wk
8 Aug
6 wk after
Onion
Allium cepa (Cepa-gruppen)
Season too short
7 Apr – 5 May
8-12 wk
30 Jun
0 wk
30 Jun
0 wk
Onion (sets)
Allium cepa (Cepa-gruppen)
Season too short
21 Jun
1 wk before
21 Jun
1 wk before
Maize
Zea mays
Greenhouse
2 – 9 Jun
14 Jun
3-4 wk
30 Jun
5 Jul
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
4 – 11 Jun
24 Jun
3-4 wk
2 Jul
15 Jul
0 wk
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
30 Jun
0 wk
30 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
Season too short
12 – 26 May
31 May
5-7 wk
30 Jun
5 Jul
0 wk
14 Jun
25 Jun
2 wk before
Potato
Solanum tuberosum
Season too short
16 – 30 May
28 May
4-6 wk
27 Jun
0 wk
27 Jun
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
12 – 26 May
10 Jun
5-7 wk
30 Jun
15 Jul
0 wk
1 Jul
5 Jul
0 wk
Pumpkin
Cucurbita pepo
Greenhouse
8 – 15 Jun
29 Jun
3-4 wk
6 Jul
20 Jul
1 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
Season too short
2 – 9 Jun
24 Jun
3-4 wk
30 Jun
15 Jul
0 wk
30 Jun
5 Jul
0 wk
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
Season too short
19 May – 2 Jun
12 Jun
4-6 wk
30 Jun
10 Jul
0 wk
Lettuce
Lactuca sativa
2 – 9 Jun
29 Jun
3-4 wk
30 Jun
20 Jul
0 wk
1 Jul
10 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
Season too short
19 May – 2 Jun
12 Jun
4-6 wk
30 Jun
10 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
Season too short
17 – 31 May
22 May
2-4 wk
14 Jun
2 wk before
14 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Season too short
21 Jun
1 wk before
21 Jun
1 wk before
Spinach
Spinacia oleracea
2 – 9 Jun
14 Jul
3-4 wk
30 Jun
4 Aug
0 wk
27 Jun
25 Jul
0 wk
Sweet potato
Ipomoea batatas
25 Jul – 8 Aug
4-6 wk
5 Sep
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
5 – 19 May
24 May
6-8 wk
30 Jun
5 Jul
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
8 – 22 Jun
1 Jul
2-4 wk
6 Jul
15 Jul
1 wk after
25 Jul
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
Season too short
19 May – 2 Jun
12 Jun
4-6 wk
30 Jun
10 Jul
0 wk
Garden pea
Pisum sativum
2 – 9 Jun
14 Jun
3-4 wk
30 Jun
5 Jul
0 wk
1 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
25 May – 8 Jun
7 Jun
4-6 wk
6 Jul
1 wk after
Lemon balm
Melissa officinalis
21 Apr – 5 May
10 May
8-10 wk
30 Jun
5 Jul
0 wk
25 Jul
4 wk after
Dill
Anethum graveolens
1 Jul
15 Jul
0 wk
Wild chives
Allium schoenoprasum
Season too short
5 – 19 May
24 May
6-8 wk
30 Jun
5 Jul
0 wk
21 Jun
25 Jun
1 wk before
Spearmint
Mentha spicata
7 Apr – 5 May
10 May
8-12 wk
30 Jun
5 Jul
0 wk
25 Jul
4 wk after
Coriander
Coriandrum sativum
30 Jun
4 Aug
0 wk
13 Jul
25 Jul
2 wk after
Garden sage
Salvia officinalis
Season too short
21 Apr – 5 May
25 Apr
8-10 wk
30 Jun
0 wk
Common thyme
Thymus vulgaris
Season too short
21 Apr – 5 May
30 Apr
8-10 wk
30 Jun
0 wk
Oregano
Origanum vulgare
5 – 19 May
14 May
6-8 wk
30 Jun
0 wk
25 Jul
4 wk after
Parsley
Petroselinum crispum
5 – 19 May
14 May
6-8 wk
30 Jun
0 wk
1 Jul
0 wk
Rosemary
Salvia rosmarinus
26 Mar – 23 Apr
27 Mar
10-14 wk
2 Jul
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
8 – 15 Jun
14 Jun
3-4 wk
6 Jul
1 wk after
Cornflower
Centaurea cyanus
30 Jun
5 Jul
0 wk
1 Jul
0 wk
Statice
Limonium sinuatum
Greenhouse
21 Apr – 5 May
30 Apr
8-10 wk
30 Jun
0 wk
Sweet William
Dianthus barbatus
5 – 19 May
6-8 wk
30 Jun
0 wk
10 Jul
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Greenhouse
5 – 19 May
14 May
6-8 wk
30 Jun
0 wk
1 Aug
5 wk after
Pinnate dahlia
Dahlia × pinnata
Fleece
7 – 21 May
14 May
6-8 wk
2 Jul
0 wk
Pinnate dahlia (tubers)
Dahlia × pinnata
Season too short
11 May – 8 Jun
28 May
4-8 wk
6 Jul
1 wk after
6 Jul
1 wk after
Foxglove
Digitalis purpurea
21 Apr – 5 May
8-10 wk
30 Jun
0 wk
13 Jul
2 wk after
Busy lizzie
Impatiens walleriana
Fleece
20 Apr – 18 May
25 Jun
8-12 wk
13 Jul
20 Aug
2 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
11 – 25 May
24 May
6-8 wk
6 Jul
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
1 – 15 Jun
4-6 wk
13 Jul
2 wk after
Chinese lantern
Physalis alkekengi
23 Apr – 7 May
8-10 wk
2 Jul
0 wk
Love in a mist
Nigella damascena
30 Jun
0 wk
1 Jul
0 wk
Strawflower
Xerochrysum bracteatum
Greenhouse
5 – 19 May
6-8 wk
30 Jun
0 wk
1 Aug
5 wk after
Purple-top vervain
Verbena bonariensis
9 Apr – 7 May
10 Apr
8-12 wk
2 Jul
0 wk
Cardoon
Cynara cardunculus
Greenhouse
7 Apr – 5 May
8-12 wk
30 Jun
0 wk
Regal-foxtail
Ptilotus nobilis
Season too short
13 Apr – 11 May
30 Apr
8-12 wk
6 Jul
1 wk after
Globe amaranth
Gomphrena globosa
Season too short
11 – 25 May
14 May
6-8 wk
6 Jul
1 wk after
Corn poppy
Papaver rhoeas
30 Jun
5 Jul
0 wk
1 Jul
0 wk
Snapdragon
Antirrhinum majus
7 Apr – 5 May
30 Apr
8-12 wk
30 Jun
0 wk
10 Jul
1 wk after
Flossflower
Ageratum houstonianum
Greenhouse
27 Apr – 11 May
10 May
8-10 wk
6 Jul
1 wk after
Sweet pea
Lathyrus odoratus
5 – 26 May
21 May
5-8 wk
30 Jun
0 wk
Stock
Matthiola incana
5 – 19 May
24 May
6-8 wk
30 Jun
5 Jul
0 wk
13 Jul
2 wk after
Wormwood
Artemisia absinthium
Season too short
5 – 19 May
6-8 wk
30 Jun
0 wk
30 Jun
0 wk
Mexican sunflower
Tithonia rotundifolia
Season too short
25 May – 8 Jun
4-6 wk
6 Jul
1 wk after
Garden pansy
Viola × wittrockiana
21 Apr – 5 May
10 May
8-10 wk
30 Jun
5 Jul
0 wk
10 Jul
1 wk after
Petunia
Petunia
Greenhouse
7 Apr – 5 May
30 Apr
8-12 wk
30 Jun
0 wk
Sweet Scabious
Scabiosa atropurpurea
7 – 21 May
6-8 wk
2 Jul
0 wk
12 Aug
6 wk after
Common zinnia
Zinnia elegans
Fleece
25 May – 8 Jun
7 Jun
4-6 wk
6 Jul
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
1 – 15 Jun
14 Jun
3-5 wk
6 Jul
1 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
25 May – 8 Jun
28 May
4-6 wk
6 Jul
1 wk after
25 Jul
4 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
20 Apr – 18 May
30 May
8-12 wk
13 Jul
25 Jul
2 wk after
Bee balm
Monarda didyma
7 Apr – 5 May
10 Apr
8-12 wk
30 Jun
0 wk
25 Jul
4 wk after
Yarrow
Achillea millefolium
Season too short
5 – 19 May
6-8 wk
30 Jun
0 wk
30 Jun
0 wk
Safflower
Carthamus tinctorius
30 Jun
0 wk
1 Jul
0 wk
Iceland poppy
Papaver nudicaule
Season too short
5 – 19 May
14 May
6-8 wk
30 Jun
0 wk
14 Jun
15 Jun
2 wk before
Bishop's flower
Ammi majus
19 May – 2 Jun
28 May
4-6 wk
30 Jun
0 wk
13 Jul
2 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
13 – 27 Apr
10-12 wk
6 Jul
1 wk after
Sunflower
Helianthus annuus
15 – 22 Jun
3-4 wk
13 Jul
2 wk after
25 Jul
4 wk after
China aster
Callistephus chinensis
18 May – 1 Jun
24 May
6-8 wk
13 Jul
2 wk after
12 Aug
6 wk after
Annual phlox
Phlox drummondii
11 – 25 May
24 May
6-8 wk
6 Jul
1 wk after
12 Aug
6 wk after
Hollyhock
Alcea rosea
5 – 19 May
6-8 wk
30 Jun
0 wk
13 Jul
2 wk after
Alpine delphinium
Delphinium elatum
7 Apr – 5 May
10 Apr
8-12 wk
30 Jun
0 wk
25 Jul
4 wk after
African marigold
Tagetes erecta
Fleece
11 – 25 May
24 May
6-8 wk
6 Jul
1 wk after
Black-eyed Susan
Rudbeckia hirta
7 – 21 May
14 May
6-8 wk
2 Jul
0 wk
12 Aug
6 wk after
Wood sage
Salvia nemorosa
21 Apr – 5 May
8-10 wk
30 Jun
0 wk
25 Jul
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
27 Apr – 25 May
24 May
6-10 wk
6 Jul
1 wk after
California goldenpoppy
Eschscholzia californica
30 Jun
5 Jul
0 wk
1 Jul
0 wk
Painted tongue
Salpiglossis sinuata
Fleece
27 Apr – 11 May
30 Apr
8-10 wk
6 Jul
1 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
5 – 19 May
6-8 wk
30 Jun
0 wk
30 Jun
0 wk