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