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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 146 days 28 Apr – 21 Sep
Probability that frost is over

10% = Half of years are frost-free by this date. More about frost & season →

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