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Rel. frost
Last spring frost (0°C) 25 May Frost 1 of 10 years · 20 years of data
Frost-free season 141 days 25 May – 13 Oct
Probability that frost is over

90% = 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 Apr
17 Jun
5-7 wk
25 May
22 Jul
0 wk
18 May
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
13 – 27 Apr
29 Jun
4-6 wk
25 May
27 Jul
0 wk
18 May
17 Jul
1 wk before
Chili pepper
Capsicum annuum
Season too short
8 Mar – 5 Apr
8-12 wk
31 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
6 – 20 Apr
12 Jun
5-7 wk
25 May
17 Jul
0 wk
13 May
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
Greenhouse
3 – 10 May
4 May
3-4 wk
31 May
1 wk after
Florence Fennel
Foeniculum vulgare
22 – 29 May
9 Jun
4-5 wk
26 Jun
7 Jul
5 wk after
30 Jun
5 wk after
Butter bean
Phaseolus lunatus
Season too short
5 – 12 Jun
3-4 wk
3 Jul
6 wk after
Onion
Allium cepa (Cepa-gruppen)
2 – 30 Mar
2 Apr
8-12 wk
25 May
28 May
0 wk
4 Jun
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
18 May
17 Jun
1 wk before
18 May
7 Jun
1 wk before
Maize
Zea mays
Greenhouse
27 Apr – 4 May
3-4 wk
25 May
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
29 Apr – 6 May
6 Jul
3-4 wk
27 May
27 Jul
0 wk
4 Jun
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
25 May
7 Jul
0 wk
13 May
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
6 – 20 Apr
12 Jun
5-7 wk
25 May
17 Jul
0 wk
13 May
7 Jul
2 wk before
Potato
Solanum tuberosum
18 Apr – 2 May
1 Jun
4-6 wk
30 May
29 Jun
1 wk after
30 May
19 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
6 – 20 Apr
22 Jun
5-7 wk
25 May
27 Jul
0 wk
18 May
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
Fleece
10 – 17 May
3-4 wk
7 Jun
2 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
29 Apr – 6 May
9 Jun
3-4 wk
27 May
30 Jun
0 wk
4 Jun
20 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
13 – 27 Apr
24 Jun
4-6 wk
25 May
22 Jul
0 wk
Lettuce
Lactuca sativa
27 Apr – 4 May
11 Jul
3-4 wk
25 May
1 Aug
0 wk
18 May
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
13 – 27 Apr
24 Jun
4-6 wk
25 May
22 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
15 – 29 Apr
3 Jun
2-4 wk
13 May
17 Jun
2 wk before
13 May
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
18 May
17 Jun
1 wk before
18 May
7 Jun
1 wk before
Spinach
Spinacia oleracea
27 Apr – 4 May
26 Jul
3-4 wk
25 May
16 Aug
0 wk
7 May
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
21 Jun – 5 Jul
4-6 wk
2 Aug
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
30 Mar – 13 Apr
3 Apr
6-8 wk
25 May
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
3 – 17 May
11 May
2-4 wk
31 May
1 wk after
15 Jun
3 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
13 – 27 Apr
24 Jun
4-6 wk
25 May
22 Jul
0 wk
Garden pea
Pisum sativum
27 Apr – 4 May
26 Jun
3-4 wk
25 May
17 Jul
0 wk
18 May
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
Greenhouse
19 Apr – 3 May
25 May
4-6 wk
31 May
22 Jun
1 wk after
Lemon balm
Melissa officinalis
16 – 30 Mar
22 May
8-10 wk
25 May
17 Jul
0 wk
15 Jun
7 Jul
3 wk after
Dill
Anethum graveolens
18 May
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
30 Mar – 13 Apr
5 Jun
6-8 wk
25 May
17 Jul
0 wk
18 May
7 Jul
1 wk before
Spearmint
Mentha spicata
2 – 30 Mar
22 May
8-12 wk
25 May
17 Jul
0 wk
15 Jun
7 Jul
3 wk after
Coriander
Coriandrum sativum
25 May
16 Aug
0 wk
4 Jun
6 Aug
1 wk after
Garden sage
Salvia officinalis
18 Mar – 1 Apr
7 May
8-10 wk
27 May
2 Jul
0 wk
Common thyme
Thymus vulgaris
16 – 30 Mar
12 May
8-10 wk
25 May
7 Jul
0 wk
Oregano
Origanum vulgare
30 Mar – 13 Apr
26 May
6-8 wk
25 May
7 Jul
0 wk
15 Jun
27 Jun
3 wk after
Parsley
Petroselinum crispum
30 Mar – 13 Apr
26 May
6-8 wk
25 May
7 Jul
0 wk
18 May
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
18 Feb – 18 Mar
8 Apr
10-14 wk
27 May
17 Jun
0 wk

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
3 – 10 May
1 Jun
3-4 wk
31 May
22 Jun
1 wk after
Cornflower
Centaurea cyanus
25 May
17 Jul
0 wk
18 May
7 Jul
1 wk before
Statice
Limonium sinuatum
29 Mar – 12 Apr
1 Apr
8-10 wk
7 Jun
2 wk after
Sweet William
Dianthus barbatus
30 Mar – 13 Apr
6-8 wk
25 May
0 wk
30 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
12 – 26 Apr
15 Apr
6-8 wk
7 Jun
2 wk after
2 Aug
10 wk after
Pinnate dahlia
Dahlia × pinnata
10 – 24 Apr
1 May
6-8 wk
5 Jun
12 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
9 Apr – 7 May
1 Jun
4-8 wk
4 Jun
29 Jun
1 wk after
4 Jun
19 Jun
1 wk after
Foxglove
Digitalis purpurea
16 – 30 Mar
8-10 wk
25 May
0 wk
4 Jun
1 wk after
Busy lizzie
Impatiens walleriana
3 Apr – 1 May
5 May
8-12 wk
26 Jun
30 Jun
5 wk after
Creeping zinnia
Sanvitalia procumbens
12 – 26 Apr
25 Apr
6-8 wk
7 Jun
2 wk after
Hyacinth bean
Dolichos lablab
Season too short
26 Apr – 10 May
4-6 wk
7 Jun
2 wk after
Chinese lantern
Physalis alkekengi
18 Mar – 1 Apr
22 Apr
8-10 wk
27 May
17 Jun
0 wk
Love in a mist
Nigella damascena
25 May
2 Jul
0 wk
18 May
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
Fleece
5 – 19 Apr
2 May
6-8 wk
31 May
13 Jun
1 wk after
10 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
4 Mar – 1 Apr
22 Apr
8-12 wk
27 May
17 Jun
0 wk
Cardoon
Cynara cardunculus
15 Mar – 12 Apr
23 Mar
8-12 wk
7 Jun
2 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
8 Mar – 5 Apr
17 Apr
8-12 wk
31 May
12 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
5 – 19 Apr
1 May
6-8 wk
31 May
12 Jun
1 wk after
Corn poppy
Papaver rhoeas
25 May
17 Jul
0 wk
18 May
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
2 – 30 Mar
12 May
8-12 wk
25 May
7 Jul
0 wk
30 May
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
17 Apr – 1 May
8-10 wk
26 Jun
5 wk after
Sweet pea
Lathyrus odoratus
30 Mar – 20 Apr
2 Jun
5-8 wk
25 May
7 Jul
0 wk
Stock
Matthiola incana
30 Mar – 13 Apr
5 Jun
6-8 wk
25 May
17 Jul
0 wk
4 Jun
7 Jul
1 wk after
Wormwood
Artemisia absinthium
30 Mar – 13 Apr
6 May
6-8 wk
25 May
17 Jun
0 wk
4 Jun
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
19 Apr – 3 May
10 May
4-6 wk
31 May
7 Jun
1 wk after
Garden pansy
Viola × wittrockiana
16 – 30 Mar
22 May
8-10 wk
25 May
17 Jul
0 wk
30 May
7 Jul
1 wk after
Petunia
Petunia
15 Mar – 12 Apr
1 Apr
8-12 wk
7 Jun
2 wk after
Sweet Scabious
Scabiosa atropurpurea
1 – 15 Apr
6 May
6-8 wk
27 May
17 Jun
0 wk
30 Jun
5 wk after
Common zinnia
Zinnia elegans
Fleece
19 Apr – 3 May
25 May
4-6 wk
31 May
22 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
26 Apr – 10 May
1 Jun
3-5 wk
31 May
22 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
26 Apr – 10 May
15 May
4-6 wk
7 Jun
12 Jun
2 wk after
30 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
3 Apr – 1 May
9 Apr
8-12 wk
26 Jun
5 wk after
Bee balm
Monarda didyma
2 – 30 Mar
22 Apr
8-12 wk
25 May
17 Jun
0 wk
15 Jun
3 wk after
Yarrow
Achillea millefolium
30 Mar – 13 Apr
6 Apr
6-8 wk
25 May
0 wk
4 Jun
1 wk after
Safflower
Carthamus tinctorius
25 May
17 Jun
0 wk
18 May
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
30 Mar – 13 Apr
26 May
6-8 wk
25 May
7 Jul
0 wk
16 Apr
27 Jun
6 wk before
Bishop's flower
Ammi majus
13 – 27 Apr
9 Jun
4-6 wk
25 May
7 Jul
0 wk
4 Jun
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Fleece
15 – 29 Mar
10-12 wk
7 Jun
2 wk after
Sunflower
Helianthus annuus
10 – 17 May
16 Jun
3-4 wk
7 Jun
7 Jul
2 wk after
15 Jun
27 Jun
3 wk after
China aster
Callistephus chinensis
12 – 26 Apr
5 Jun
6-8 wk
7 Jun
17 Jul
2 wk after
30 Jun
7 Jul
5 wk after
Annual phlox
Phlox drummondii
5 – 19 Apr
25 Apr
6-8 wk
31 May
6 Jun
1 wk after
30 Jun
5 wk after
Hollyhock
Alcea rosea
30 Mar – 13 Apr
6-8 wk
25 May
0 wk
4 Jun
1 wk after
Alpine delphinium
Delphinium elatum
2 – 30 Mar
22 Apr
8-12 wk
25 May
17 Jun
0 wk
15 Jun
3 wk after
African marigold
Tagetes erecta
12 – 26 Apr
25 Apr
6-8 wk
7 Jun
2 wk after
Black-eyed Susan
Rudbeckia hirta
1 – 15 Apr
26 May
6-8 wk
27 May
7 Jul
0 wk
30 Jun
5 wk after
Wood sage
Salvia nemorosa
16 – 30 Mar
12 Apr
8-10 wk
25 May
7 Jun
0 wk
15 Jun
3 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
22 Mar – 19 Apr
11 May
6-10 wk
31 May
22 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
25 May
17 Jul
0 wk
18 May
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
29 Mar – 12 Apr
12 May
8-10 wk
7 Jun
7 Jul
2 wk after
Water forget-me-not
Myosotis scorpioides
30 Mar – 13 Apr
6 May
6-8 wk
25 May
17 Jun
0 wk
4 Jun
7 Jun
1 wk after