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Rel. frost
Last spring frost (0°C) 16 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 186 days 16 Apr – 19 Oct
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)
27 Mar – 10 Apr
17 Jun
5-7 wk
15 May
22 Jul
4 wk after
9 Apr
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
19 Mar – 2 Apr
29 Jun
4-6 wk
30 Apr
27 Jul
2 wk after
9 Apr
17 Jul
1 wk before
Chili pepper
Capsicum annuum
Greenhouse
26 Feb – 26 Mar
26 Mar
8-12 wk
21 May
21 May
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
1 – 15 Feb
12 Jun
5-7 wk
22 Mar
17 Jul
4 wk before
4 Apr
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
Fleece
5 – 12 May
20 May
3-4 wk
2 Jun
10 Jun
7 wk after
Florence Fennel
Foeniculum vulgare
6 – 13 May
9 Jun
4-5 wk
10 Jun
7 Jul
8 wk after
22 May
27 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
15 – 22 May
3-4 wk
12 Jun
8 wk after
Onion
Allium cepa (Cepa-gruppen)
22 Jan – 19 Feb
2 Apr
8-12 wk
16 Apr
28 May
Vid frost
26 Apr
18 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
9 Apr
17 Jun
1 wk before
9 Apr
7 Jun
1 wk before
Maize
Zea mays
Fleece
23 – 30 Apr
10 May
3-4 wk
21 May
31 May
5 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
17 – 24 Apr
6 Jul
3-4 wk
15 May
27 Jul
4 wk after
26 Apr
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
4 Apr
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
1 – 15 Feb
12 Jun
5-7 wk
22 Mar
17 Jul
4 wk before
4 Apr
7 Jul
2 wk before
Potato
Solanum tuberosum
10 – 24 Mar
30 May
4-6 wk
21 Apr
27 Jun
1 wk after
21 Apr
17 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
1 – 15 Feb
22 Jun
5-7 wk
22 Mar
27 Jul
4 wk before
9 Apr
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
13 – 20 May
25 May
3-4 wk
10 Jun
15 Jun
8 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
17 – 24 Apr
9 Jun
3-4 wk
15 May
30 Jun
4 wk after
26 Apr
20 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
19 Mar – 2 Apr
24 Jun
4-6 wk
30 Apr
22 Jul
2 wk after
Lettuce
Lactuca sativa
12 – 19 Mar
11 Jul
3-4 wk
9 Apr
1 Aug
1 wk before
9 Apr
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
26 Feb – 12 Mar
24 Jun
4-6 wk
9 Apr
22 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
7 – 21 Mar
3 Jun
2-4 wk
4 Apr
17 Jun
2 wk before
4 Apr
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
9 Apr
17 Jun
1 wk before
9 Apr
7 Jun
1 wk before
Spinach
Spinacia oleracea
4 – 11 Mar
26 Jul
3-4 wk
1 Apr
16 Aug
2 wk before
29 Mar
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
13 – 27 May
4-6 wk
24 Jun
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
26 Mar – 9 Apr
19 Apr
6-8 wk
21 May
31 May
5 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
5 – 19 May
27 May
2-4 wk
2 Jun
10 Jun
7 wk after
22 May
31 May
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
19 Mar – 2 Apr
24 Jun
4-6 wk
30 Apr
22 Jul
2 wk after
Garden pea
Pisum sativum
4 – 11 Mar
26 Jun
3-4 wk
1 Apr
17 Jul
2 wk before
9 Apr
7 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
29 Apr – 13 May
3 May
4-6 wk
10 Jun
8 wk after
Lemon balm
Melissa officinalis
5 – 19 Feb
22 May
8-10 wk
16 Apr
17 Jul
Vid frost
7 May
7 Jul
3 wk after
Dill
Anethum graveolens
9 Apr
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
25 Jan – 8 Feb
5 Jun
6-8 wk
22 Mar
17 Jul
4 wk before
9 Apr
7 Jul
1 wk before
Spearmint
Mentha spicata
7 Jan – 4 Feb
22 May
8-12 wk
1 Apr
17 Jul
2 wk before
7 May
7 Jul
3 wk after
Coriander
Coriandrum sativum
26 Apr
6 Aug
1 wk after
Garden sage
Salvia officinalis
6 – 20 Mar
7 May
8-10 wk
15 May
2 Jul
4 wk after
Common thyme
Thymus vulgaris
19 Feb – 5 Mar
12 May
8-10 wk
30 Apr
7 Jul
2 wk after
Oregano
Origanum vulgare
25 Feb – 11 Mar
26 May
6-8 wk
22 Apr
7 Jul
1 wk after
7 May
27 Jun
3 wk after
Parsley
Petroselinum crispum
4 – 18 Feb
26 May
6-8 wk
1 Apr
7 Jul
2 wk before
9 Apr
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
6 Feb – 6 Mar
8 Apr
10-14 wk
15 May
17 Jun
4 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
13 – 20 May
3-4 wk
10 Jun
8 wk after
Cornflower
Centaurea cyanus
1 Apr
17 Jul
2 wk before
9 Apr
7 Jul
1 wk before
Statice
Limonium sinuatum
24 Mar – 7 Apr
13 Apr
8-10 wk
2 Jun
8 Jun
7 wk after
Sweet William
Dianthus barbatus
4 – 18 Feb
6-8 wk
1 Apr
2 wk before
21 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
7 – 21 Apr
27 Apr
6-8 wk
2 Jun
8 Jun
7 wk after
24 Jun
10 wk after
Pinnate dahlia
Dahlia × pinnata
1 – 15 Apr
5 May
6-8 wk
27 May
16 Jun
6 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
12 Mar – 9 Apr
19 May
4-8 wk
7 May
16 Jun
3 wk after
7 May
6 Jun
3 wk after
Foxglove
Digitalis purpurea
21 Jan – 4 Feb
8-10 wk
1 Apr
2 wk before
26 Apr
1 wk after
Busy lizzie
Impatiens walleriana
18 Mar – 15 Apr
7 Jun
8-12 wk
10 Jun
2 Aug
8 wk after
Creeping zinnia
Sanvitalia procumbens
7 – 21 Apr
7 May
6-8 wk
2 Jun
18 Jun
7 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
21 Apr – 5 May
4-6 wk
2 Jun
7 wk after
Chinese lantern
Physalis alkekengi
6 – 20 Mar
22 Apr
8-10 wk
15 May
17 Jun
4 wk after
Love in a mist
Nigella damascena
9 Apr
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
7 – 21 Apr
17 Apr
6-8 wk
2 Jun
7 wk after
24 Jun
10 wk after
Purple-top vervain
Verbena bonariensis
20 Feb – 20 Mar
22 Apr
8-12 wk
15 May
17 Jun
4 wk after
Cardoon
Cynara cardunculus
10 Mar – 7 Apr
23 Mar
8-12 wk
2 Jun
7 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
10 Mar – 7 Apr
12 Apr
8-12 wk
2 Jun
7 Jun
7 wk after
Globe amaranth
Gomphrena globosa
Fleece
7 – 21 Apr
26 Apr
6-8 wk
2 Jun
7 Jun
7 wk after
Corn poppy
Papaver rhoeas
9 Apr
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
15 Jan – 12 Feb
12 May
8-12 wk
9 Apr
7 Jul
1 wk before
21 Apr
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
1 – 15 Apr
23 Apr
8-10 wk
10 Jun
18 Jun
8 wk after
Sweet pea
Lathyrus odoratus
4 – 25 Feb
2 Jun
5-8 wk
1 Apr
7 Jul
2 wk before
Stock
Matthiola incana
12 – 26 Feb
5 Jun
6-8 wk
9 Apr
17 Jul
1 wk before
26 Apr
7 Jul
1 wk after
Wormwood
Artemisia absinthium
4 – 18 Feb
6 May
6-8 wk
1 Apr
17 Jun
2 wk before
26 Apr
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
21 Apr – 5 May
5 May
4-6 wk
2 Jun
2 Jun
7 wk after
Garden pansy
Viola × wittrockiana
11 – 25 Jan
22 May
8-10 wk
22 Mar
17 Jul
4 wk before
21 Apr
7 Jul
1 wk after
Petunia
Petunia
10 Mar – 7 Apr
13 Apr
8-12 wk
2 Jun
8 Jun
7 wk after
Sweet Scabious
Scabiosa atropurpurea
20 Mar – 3 Apr
6 May
6-8 wk
15 May
17 Jun
4 wk after
22 May
7 Jun
5 wk after
Common zinnia
Zinnia elegans
21 Apr – 5 May
20 May
4-6 wk
2 Jun
17 Jun
7 wk after
Common morning glory
Ipomoea purpurea
6 – 20 May
10 May
3-5 wk
10 Jun
8 wk after
Garden cosmos
Cosmos bipinnatus
21 Apr – 5 May
19 May
4-6 wk
2 Jun
16 Jun
7 wk after
22 May
6 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
22 Mar – 19 Apr
25 Apr
8-12 wk
14 Jun
20 Jun
8 wk after
Bee balm
Monarda didyma
22 Jan – 19 Feb
22 Apr
8-12 wk
16 Apr
17 Jun
Vid frost
7 May
7 Jun
3 wk after
Yarrow
Achillea millefolium
4 – 18 Feb
6 Apr
6-8 wk
1 Apr
18 May
2 wk before
26 Apr
8 May
1 wk after
Safflower
Carthamus tinctorius
1 Apr
17 Jun
2 wk before
9 Apr
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
25 Jan – 8 Feb
26 May
6-8 wk
22 Mar
7 Jul
4 wk before
4 Apr
27 Jun
2 wk before
Bishop's flower
Ammi majus
15 – 29 Mar
9 Jun
4-6 wk
26 Apr
7 Jul
1 wk after
26 Apr
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Fleece
10 – 24 Mar
18 Mar
10-12 wk
2 Jun
7 wk after
Sunflower
Helianthus annuus
5 – 12 May
16 Jun
3-4 wk
2 Jun
7 Jul
7 wk after
7 May
27 Jun
3 wk after
China aster
Callistephus chinensis
7 – 21 Apr
5 Jun
6-8 wk
2 Jun
17 Jul
7 wk after
22 May
7 Jul
5 wk after
Annual phlox
Phlox drummondii
26 Mar – 9 Apr
7 May
6-8 wk
21 May
18 Jun
5 wk after
22 May
8 Jun
5 wk after
Hollyhock
Alcea rosea
4 – 18 Feb
6-8 wk
1 Apr
2 wk before
26 Apr
1 wk after
Alpine delphinium
Delphinium elatum
5 Feb – 5 Mar
22 Apr
8-12 wk
30 Apr
17 Jun
2 wk after
7 May
7 Jun
3 wk after
African marigold
Tagetes erecta
7 – 21 Apr
7 May
6-8 wk
2 Jun
18 Jun
7 wk after
Black-eyed Susan
Rudbeckia hirta
20 Mar – 3 Apr
26 May
6-8 wk
15 May
7 Jul
4 wk after
22 May
27 Jun
5 wk after
Wood sage
Salvia nemorosa
11 – 25 Feb
12 Apr
8-10 wk
22 Apr
7 Jun
1 wk after
7 May
28 May
3 wk after
Black-eyed susan vine
Thunbergia alata
1 – 29 Apr
19 Apr
6-10 wk
10 Jun
8 wk after
California goldenpoppy
Eschscholzia californica
9 Apr
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
24 Mar – 7 Apr
12 May
8-10 wk
2 Jun
7 Jul
7 wk after
Water forget-me-not
Myosotis scorpioides
4 – 18 Feb
6 May
6-8 wk
1 Apr
17 Jun
2 wk before
26 Apr
7 Jun
1 wk after