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