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Rel. frost
Last spring frost (0°C) 24 Apr Frost 9 of 10 years · 20 years of data
Frost-free season 153 days 24 Apr – 24 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)
6 – 20 Mar
19 Jun
5-7 wk
24 Apr
24 Jul
0 wk
17 Apr
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
13 – 27 Mar
1 Jul
4-6 wk
24 Apr
29 Jul
0 wk
17 Apr
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
10 Feb – 10 Mar
8-12 wk
5 May
2 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
6 – 20 Mar
14 Jun
5-7 wk
24 Apr
19 Jul
0 wk
12 Apr
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
Season too short
7 – 14 Apr
3-4 wk
5 May
2 wk after
Florence Fennel
Foeniculum vulgare
25 Apr – 2 May
26 May
4-5 wk
30 May
23 Jun
5 wk after
30 May
13 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
9 – 16 May
3-4 wk
6 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
30 Jan – 27 Feb
2 Apr
8-12 wk
24 Apr
28 May
0 wk
4 May
18 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
17 Apr
17 Jun
1 wk before
17 Apr
7 Jun
1 wk before
Maize
Zea mays
Season too short
27 Mar – 3 Apr
3-4 wk
24 Apr
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
2 – 9 Apr
3 Jul
3-4 wk
30 Apr
24 Jul
1 wk after
4 May
14 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
24 Apr
9 Jul
0 wk
12 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
6 – 20 Mar
14 Jun
5-7 wk
24 Apr
19 Jul
0 wk
12 Apr
9 Jul
2 wk before
Potato
Solanum tuberosum
18 Mar – 1 Apr
5 Jun
4-6 wk
29 Apr
3 Jul
1 wk after
29 Apr
23 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
6 – 20 Mar
24 Jun
5-7 wk
24 Apr
29 Jul
0 wk
17 Apr
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
Greenhouse
7 – 14 Apr
23 May
3-4 wk
5 May
13 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
2 – 9 Apr
11 Jun
3-4 wk
30 Apr
2 Jul
1 wk after
4 May
22 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
13 – 27 Mar
26 Jun
4-6 wk
24 Apr
24 Jul
0 wk
Lettuce
Lactuca sativa
27 Mar – 3 Apr
13 Jul
3-4 wk
24 Apr
3 Aug
0 wk
17 Apr
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
13 – 27 Mar
26 Jun
4-6 wk
24 Apr
24 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
15 – 29 Mar
5 Jun
2-4 wk
12 Apr
19 Jun
2 wk before
12 Apr
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
17 Apr
17 Jun
1 wk before
17 Apr
7 Jun
1 wk before
Spinach
Spinacia oleracea
27 Mar – 3 Apr
28 Jul
3-4 wk
24 Apr
18 Aug
0 wk
6 Apr
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
21 May – 4 Jun
4-6 wk
2 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Season too short
27 Feb – 13 Mar
1 Mar
6-8 wk
24 Apr
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Greenhouse
27 Mar – 10 Apr
25 May
2-4 wk
24 Apr
8 Jun
0 wk
4 May
29 May
1 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
13 – 27 Mar
26 Jun
4-6 wk
24 Apr
24 Jul
0 wk
Garden pea
Pisum sativum
27 Mar – 3 Apr
28 Jun
3-4 wk
24 Apr
19 Jul
0 wk
17 Apr
9 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
24 Mar – 7 Apr
1 May
4-6 wk
5 May
29 May
2 wk after
Lemon balm
Melissa officinalis
13 – 27 Feb
24 May
8-10 wk
24 Apr
19 Jul
0 wk
15 May
9 Jul
3 wk after
Dill
Anethum graveolens
17 Apr
24 Jul
1 wk before
Wild chives
Allium schoenoprasum
27 Feb – 13 Mar
7 Jun
6-8 wk
24 Apr
19 Jul
0 wk
17 Apr
9 Jul
1 wk before
Spearmint
Mentha spicata
30 Jan – 27 Feb
24 May
8-12 wk
24 Apr
19 Jul
0 wk
15 May
9 Jul
3 wk after
Coriander
Coriandrum sativum
24 Apr
13 Aug
0 wk
4 May
3 Aug
1 wk after
Garden sage
Salvia officinalis
19 Feb – 5 Mar
9 May
8-10 wk
30 Apr
4 Jul
1 wk after
Common thyme
Thymus vulgaris
13 – 27 Feb
14 May
8-10 wk
24 Apr
9 Jul
0 wk
Oregano
Origanum vulgare
27 Feb – 13 Mar
28 May
6-8 wk
24 Apr
9 Jul
0 wk
15 May
29 Jun
3 wk after
Parsley
Petroselinum crispum
27 Feb – 13 Mar
28 May
6-8 wk
24 Apr
9 Jul
0 wk
17 Apr
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
22 Jan – 19 Feb
29 Mar
10-14 wk
30 Apr
7 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
7 – 14 Apr
8 May
3-4 wk
5 May
29 May
2 wk after
Cornflower
Centaurea cyanus
24 Apr
19 Jul
0 wk
17 Apr
9 Jul
1 wk before
Statice
Limonium sinuatum
4 – 18 Mar
18 Mar
8-10 wk
13 May
13 May
3 wk after
Sweet William
Dianthus barbatus
27 Feb – 13 Mar
6-8 wk
24 Apr
0 wk
29 Apr
1 wk after
Snow-on-the-mountain
Euphorbia marginata
18 Mar – 1 Apr
1 Apr
6-8 wk
13 May
13 May
3 wk after
2 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
13 – 27 Mar
7 Apr
6-8 wk
8 May
19 May
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
20 Mar – 17 Apr
21 Apr
4-8 wk
15 May
19 May
3 wk after
15 May
3 wk after
Foxglove
Digitalis purpurea
13 – 27 Feb
8-10 wk
24 Apr
0 wk
4 May
1 wk after
Busy lizzie
Impatiens walleriana
Fleece
18 Feb – 18 Mar
19 May
8-12 wk
13 May
14 Jul
3 wk after
Creeping zinnia
Sanvitalia procumbens
18 Mar – 1 Apr
11 Apr
6-8 wk
13 May
23 May
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
1 – 15 Apr
4-6 wk
13 May
3 wk after
Chinese lantern
Physalis alkekengi
19 Feb – 5 Mar
19 Apr
8-10 wk
30 Apr
14 Jun
1 wk after
Love in a mist
Nigella damascena
24 Apr
4 Jul
0 wk
17 Apr
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
Fleece
10 – 24 Mar
15 Apr
6-8 wk
5 May
27 May
2 wk after
9 Jun
7 wk after
Purple-top vervain
Verbena bonariensis
5 Feb – 5 Mar
19 Apr
8-12 wk
30 Apr
14 Jun
1 wk after
Cardoon
Cynara cardunculus
18 Feb – 18 Mar
20 Mar
8-12 wk
13 May
15 May
3 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
10 Feb – 10 Mar
24 Mar
8-12 wk
5 May
19 May
2 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
10 – 24 Mar
7 Apr
6-8 wk
5 May
19 May
2 wk after
Corn poppy
Papaver rhoeas
24 Apr
19 Jul
0 wk
17 Apr
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
30 Jan – 27 Feb
14 May
8-12 wk
24 Apr
9 Jul
0 wk
29 Apr
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
4 – 18 Mar
21 Apr
8-10 wk
13 May
16 Jun
3 wk after
Sweet pea
Lathyrus odoratus
27 Feb – 20 Mar
4 Jun
5-8 wk
24 Apr
9 Jul
0 wk
Stock
Matthiola incana
27 Feb – 13 Mar
7 Jun
6-8 wk
24 Apr
19 Jul
0 wk
4 May
9 Jul
1 wk after
Wormwood
Artemisia absinthium
27 Feb – 13 Mar
8 May
6-8 wk
24 Apr
19 Jun
0 wk
4 May
9 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
24 Mar – 7 Apr
16 Apr
4-6 wk
5 May
14 May
2 wk after
Garden pansy
Viola × wittrockiana
13 – 27 Feb
24 May
8-10 wk
24 Apr
19 Jul
0 wk
29 Apr
9 Jul
1 wk after
Petunia
Petunia
18 Feb – 18 Mar
18 Mar
8-12 wk
13 May
13 May
3 wk after
Sweet Scabious
Scabiosa atropurpurea
5 – 19 Mar
3 May
6-8 wk
30 Apr
14 Jun
1 wk after
30 May
4 Jun
5 wk after
Common zinnia
Zinnia elegans
Fleece
24 Mar – 7 Apr
1 May
4-6 wk
5 May
29 May
2 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
31 Mar – 14 Apr
8 May
3-5 wk
5 May
29 May
2 wk after
Garden cosmos
Cosmos bipinnatus
1 – 15 Apr
21 Apr
4-6 wk
13 May
19 May
3 wk after
30 May
5 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
18 Feb – 18 Mar
23 Apr
8-12 wk
13 May
18 Jun
3 wk after
Bee balm
Monarda didyma
30 Jan – 27 Feb
24 Apr
8-12 wk
24 Apr
19 Jun
0 wk
15 May
9 Jun
3 wk after
Yarrow
Achillea millefolium
27 Feb – 13 Mar
8 Apr
6-8 wk
24 Apr
20 May
0 wk
4 May
10 May
1 wk after
Safflower
Carthamus tinctorius
24 Apr
19 Jun
0 wk
17 Apr
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
27 Feb – 13 Mar
28 May
6-8 wk
24 Apr
9 Jul
0 wk
16 Mar
29 Jun
6 wk before
Bishop's flower
Ammi majus
13 – 27 Mar
11 Jun
4-6 wk
24 Apr
9 Jul
0 wk
4 May
29 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Greenhouse
10 – 24 Feb
9 Mar
10-12 wk
5 May
18 May
2 wk after
Sunflower
Helianthus annuus
15 – 22 Apr
6 Jun
3-4 wk
13 May
27 Jun
3 wk after
15 May
17 Jun
3 wk after
China aster
Callistephus chinensis
18 Mar – 1 Apr
26 May
6-8 wk
13 May
7 Jul
3 wk after
30 May
27 Jun
5 wk after
Annual phlox
Phlox drummondii
10 – 24 Mar
11 Apr
6-8 wk
5 May
23 May
2 wk after
30 May
5 wk after
Hollyhock
Alcea rosea
27 Feb – 13 Mar
6-8 wk
24 Apr
0 wk
4 May
1 wk after
Alpine delphinium
Delphinium elatum
30 Jan – 27 Feb
24 Apr
8-12 wk
24 Apr
19 Jun
0 wk
15 May
9 Jun
3 wk after
African marigold
Tagetes erecta
18 Mar – 1 Apr
11 Apr
6-8 wk
13 May
23 May
3 wk after
Black-eyed Susan
Rudbeckia hirta
5 – 19 Mar
16 May
6-8 wk
30 Apr
27 Jun
1 wk after
30 May
17 Jun
5 wk after
Wood sage
Salvia nemorosa
13 – 27 Feb
14 Apr
8-10 wk
24 Apr
9 Jun
0 wk
15 May
30 May
3 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
24 Feb – 24 Mar
17 Apr
6-10 wk
5 May
29 May
2 wk after
California goldenpoppy
Eschscholzia californica
24 Apr
19 Jul
0 wk
17 Apr
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
4 – 18 Mar
28 Apr
8-10 wk
13 May
23 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
27 Feb – 13 Mar
8 May
6-8 wk
24 Apr
19 Jun
0 wk
4 May
9 Jun
1 wk after