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Rel. frost
Last spring frost (0°C) 1 May Frost 3 of 4 years · 20 years of data
Frost-free season 153 days 1 May – 1 Oct
Probability that frost is over

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