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Rel. frost
Last spring frost (0°C) 30 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 150 days 30 Apr – 27 Sep
Probability that frost is over

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