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Rel. frost
Last spring frost (0°C) 28 May Frost 1 of 10 years · 20 years of data
Frost-free season 140 days 28 May – 15 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)
11 – 25 May
13 Jun
5-7 wk
29 Jun
18 Jul
5 wk after
29 May
8 Jul
Vid frost
Broccoli
Brassica oleracea (Italica-gruppen)
5 – 19 May
25 Jun
4-6 wk
16 Jun
23 Jul
3 wk after
29 May
13 Jul
Vid frost
Chili pepper
Capsicum annuum
Season too short
8 Apr – 6 May
8-12 wk
1 Jul
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
27 Mar – 10 Apr
8 Jun
5-7 wk
15 May
13 Jul
2 wk before
28 May
3 Jul
Vid frost
Garden cucumber
Cucumis sativus
Greenhouse
3 – 10 Jun
3-4 wk
1 Jul
5 wk after
Florence Fennel
Foeniculum vulgare
9 – 16 Jun
4-5 wk
14 Jul
7 wk after
10 Jul
6 wk after
Butter bean
Phaseolus lunatus
Season too short
17 – 24 Jun
3-4 wk
15 Jul
7 wk after
Onion
Allium cepa (Cepa-gruppen)
5 Mar – 2 Apr
29 Mar
8-12 wk
28 May
Vid frost
10 Jun
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
29 May
13 Jun
Vid frost
29 May
3 Jun
Vid frost
Maize
Zea mays
Greenhouse
27 May – 3 Jun
3-4 wk
24 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
1 – 8 Jun
2 Jul
3-4 wk
29 Jun
23 Jul
5 wk after
10 Jun
13 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
28 May
23 Jun
Vid frost
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
27 Mar – 10 Apr
8 Jun
5-7 wk
15 May
13 Jul
2 wk before
28 May
3 Jul
Vid frost
Potato
Solanum tuberosum
26 Apr – 10 May
5 Jun
4-6 wk
7 Jun
3 Jul
1 wk after
7 Jun
23 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
27 Mar – 10 Apr
18 Jun
5-7 wk
15 May
23 Jul
2 wk before
29 May
13 Jul
Vid frost
Pumpkin
Cucurbita pepo
Fleece
10 – 17 Jun
3-4 wk
8 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
1 – 8 Jun
17 Jun
3-4 wk
29 Jun
8 Jul
5 wk after
10 Jun
28 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
5 – 19 May
20 Jun
4-6 wk
16 Jun
18 Jul
3 wk after
Lettuce
Lactuca sativa
25 Apr – 2 May
7 Jul
3-4 wk
23 May
28 Jul
1 wk before
29 May
18 Jul
Vid frost
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
11 – 25 Apr
20 Jun
4-6 wk
23 May
18 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
30 Apr – 14 May
30 May
2-4 wk
28 May
13 Jun
Vid frost
28 May
3 Jun
Vid frost
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
29 May
13 Jun
Vid frost
29 May
3 Jun
Vid frost
Spinach
Spinacia oleracea
20 – 27 Apr
22 Jul
3-4 wk
18 May
12 Aug
1 wk before
25 May
2 Aug
Vid frost
Sweet potato
Ipomoea batatas
22 Jun – 6 Jul
4-6 wk
3 Aug
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
29 Apr – 13 May
6-8 wk
24 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
3 – 17 Jun
2-4 wk
1 Jul
5 wk after
22 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
5 – 19 May
20 Jun
4-6 wk
16 Jun
18 Jul
3 wk after
Garden pea
Pisum sativum
20 – 27 Apr
22 Jun
3-4 wk
18 May
13 Jul
1 wk before
29 May
3 Jul
Vid frost

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Greenhouse
20 May – 3 Jun
28 May
4-6 wk
1 Jul
5 wk after
Lemon balm
Melissa officinalis
19 Mar – 2 Apr
18 May
8-10 wk
28 May
13 Jul
Vid frost
22 Jun
3 Jul
4 wk after
Dill
Anethum graveolens
29 May
23 Jul
Vid frost
Wild chives
Allium schoenoprasum
20 Mar – 3 Apr
1 Jun
6-8 wk
15 May
13 Jul
2 wk before
29 May
3 Jul
Vid frost
Spearmint
Mentha spicata
23 Feb – 23 Mar
18 May
8-12 wk
18 May
13 Jul
1 wk before
22 Jun
3 Jul
4 wk after
Coriander
Coriandrum sativum
10 Jun
2 Aug
2 wk after
Garden sage
Salvia officinalis
20 Apr – 4 May
3 May
8-10 wk
29 Jun
5 wk after
Common thyme
Thymus vulgaris
7 – 21 Apr
8 May
8-10 wk
16 Jun
3 Jul
3 wk after
Oregano
Origanum vulgare
7 – 21 Apr
22 May
6-8 wk
2 Jun
3 Jul
1 wk after
22 Jun
23 Jun
4 wk after
Parsley
Petroselinum crispum
23 Mar – 6 Apr
22 May
6-8 wk
18 May
3 Jul
1 wk before
29 May
23 Jun
Vid frost
Rosemary
Salvia rosmarinus
23 Mar – 20 Apr
4 Apr
10-14 wk
29 Jun
5 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
3 – 10 Jun
4 Jun
3-4 wk
1 Jul
5 wk after
Cornflower
Centaurea cyanus
18 May
13 Jul
1 wk before
29 May
3 Jul
Vid frost
Statice
Limonium sinuatum
Fleece
22 Apr – 6 May
25 Apr
8-10 wk
1 Jul
5 wk after
Sweet William
Dianthus barbatus
23 Mar – 6 Apr
6-8 wk
18 May
1 wk before
7 Jun
1 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
6 – 20 May
9 May
6-8 wk
1 Jul
5 wk after
17 Jul
7 wk after
Pinnate dahlia
Dahlia × pinnata
10 – 24 May
6-8 wk
5 Jul
5 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
27 Apr – 25 May
18 May
4-8 wk
22 Jun
4 wk after
22 Jun
4 wk after
Foxglove
Digitalis purpurea
9 – 23 Mar
8-10 wk
18 May
1 wk before
10 Jun
2 wk after
Busy lizzie
Impatiens walleriana
21 Apr – 19 May
27 May
8-12 wk
14 Jul
22 Jul
7 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
6 – 20 May
19 May
6-8 wk
1 Jul
5 wk after
Hyacinth bean
Dolichos lablab
Season too short
27 May – 10 Jun
4-6 wk
8 Jul
6 wk after
Chinese lantern
Physalis alkekengi
20 Apr – 4 May
8-10 wk
29 Jun
5 wk after
Love in a mist
Nigella damascena
29 May
18 Jun
Vid frost
Strawflower
Xerochrysum bracteatum
Fleece
6 – 20 May
6-8 wk
1 Jul
5 wk after
17 Jul
7 wk after
Purple-top vervain
Verbena bonariensis
6 Apr – 4 May
18 Apr
8-12 wk
29 Jun
5 wk after
Cardoon
Cynara cardunculus
Fleece
8 Apr – 6 May
8-12 wk
1 Jul
5 wk after
Regal-foxtail
Ptilotus nobilis
Greenhouse
8 Apr – 6 May
20 Apr
8-12 wk
1 Jul
5 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
6 – 20 May
6-8 wk
1 Jul
5 wk after
Corn poppy
Papaver rhoeas
29 May
3 Jul
Vid frost
Snapdragon
Antirrhinum majus
28 Feb – 28 Mar
8 May
8-12 wk
23 May
3 Jul
1 wk before
7 Jun
23 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
29 Apr – 13 May
5 May
8-10 wk
8 Jul
6 wk after
Sweet pea
Lathyrus odoratus
23 Mar – 13 Apr
29 May
5-8 wk
18 May
3 Jul
1 wk before
Stock
Matthiola incana
28 Mar – 11 Apr
1 Jun
6-8 wk
23 May
13 Jul
1 wk before
10 Jun
3 Jul
2 wk after
Wormwood
Artemisia absinthium
23 Mar – 6 Apr
2 May
6-8 wk
18 May
13 Jun
1 wk before
10 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
20 May – 3 Jun
4-6 wk
1 Jul
5 wk after
Garden pansy
Viola × wittrockiana
6 – 20 Mar
18 May
8-10 wk
15 May
13 Jul
2 wk before
7 Jun
3 Jul
1 wk after
Petunia
Petunia
Fleece
8 Apr – 6 May
25 Apr
8-12 wk
1 Jul
5 wk after
Sweet Scabious
Scabiosa atropurpurea
4 – 18 May
6-8 wk
29 Jun
5 wk after
10 Jul
6 wk after
Common zinnia
Zinnia elegans
Fleece
20 May – 3 Jun
28 May
4-6 wk
1 Jul
5 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
27 May – 10 Jun
4 Jun
3-5 wk
1 Jul
5 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
20 May – 3 Jun
24 May
4-6 wk
1 Jul
5 wk after
22 Jun
4 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
21 Apr – 19 May
1 May
8-12 wk
14 Jul
7 wk after
Bee balm
Monarda didyma
5 Mar – 2 Apr
18 Apr
8-12 wk
28 May
13 Jun
Vid frost
22 Jun
4 wk after
Yarrow
Achillea millefolium
23 Mar – 6 Apr
2 Apr
6-8 wk
18 May
1 wk before
10 Jun
2 wk after
Safflower
Carthamus tinctorius
18 May
13 Jun
1 wk before
29 May
3 Jun
Vid frost
Iceland poppy
Papaver nudicaule
20 Mar – 3 Apr
22 May
6-8 wk
15 May
3 Jul
2 wk before
28 May
23 Jun
Vid frost
Bishop's flower
Ammi majus
25 Apr – 9 May
5 Jun
4-6 wk
6 Jun
3 Jul
1 wk after
10 Jun
23 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Season too short
8 – 22 Apr
10-12 wk
1 Jul
5 wk after
Sunflower
Helianthus annuus
10 – 17 Jun
12 Jun
3-4 wk
8 Jul
6 wk after
22 Jun
23 Jun
4 wk after
China aster
Callistephus chinensis
13 – 27 May
1 Jun
6-8 wk
8 Jul
13 Jul
6 wk after
10 Jul
6 wk after
Annual phlox
Phlox drummondii
6 – 20 May
6-8 wk
1 Jul
5 wk after
10 Jul
6 wk after
Hollyhock
Alcea rosea
23 Mar – 6 Apr
6-8 wk
18 May
1 wk before
10 Jun
2 wk after
Alpine delphinium
Delphinium elatum
24 Mar – 21 Apr
18 Apr
8-12 wk
16 Jun
3 wk after
22 Jun
4 wk after
African marigold
Tagetes erecta
Fleece
6 – 20 May
19 May
6-8 wk
1 Jul
5 wk after
Black-eyed Susan
Rudbeckia hirta
4 – 18 May
22 May
6-8 wk
29 Jun
3 Jul
5 wk after
10 Jul
6 wk after
Wood sage
Salvia nemorosa
24 Mar – 7 Apr
8 Apr
8-10 wk
2 Jun
3 Jun
1 wk after
22 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
22 Apr – 20 May
14 May
6-10 wk
1 Jul
5 wk after
California goldenpoppy
Eschscholzia californica
29 May
3 Jul
Vid frost
Painted tongue
Salpiglossis sinuata
29 Apr – 13 May
8 May
8-10 wk
8 Jul
6 wk after
Water forget-me-not
Myosotis scorpioides
23 Mar – 6 Apr
2 May
6-8 wk
18 May
13 Jun
1 wk before
10 Jun
2 wk after