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Method
Rel. frost
Last spring frost (0°C) 28 May Frost 3 of 4 years · 20 years of data
Frost-free season 93 days 28 May – 29 Aug
Probability that frost is over

25% = Half of years are frost-free by this date. More about frost & season →

Custom date
Note: This location has a shorter growing season. Plants marked with Fleece, Greenhouse or Season too short need extra protection or are difficult to grow here.

Vegetables

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

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
Greenhouse
22 Apr – 6 May
22 May
4-6 wk
3 Jun
19 Jun
1 wk after
Lemon balm
Melissa officinalis
19 Mar – 2 Apr
20 May
8-10 wk
28 May
15 Jul
0 wk
2 Jul
5 Jul
5 wk after
Dill
Anethum graveolens
1 Jun
9 Jul
1 wk after
Wild chives
Allium schoenoprasum
2 – 16 Apr
3 Jun
6-8 wk
28 May
15 Jul
0 wk
1 Jun
5 Jul
1 wk after
Spearmint
Mentha spicata
5 Mar – 2 Apr
20 May
8-12 wk
28 May
15 Jul
0 wk
2 Jul
5 Jul
5 wk after
Coriander
Coriandrum sativum
28 May
29 Jul
0 wk
18 Jun
19 Jul
3 wk after
Garden sage
Salvia officinalis
21 Mar – 4 Apr
5 May
8-10 wk
30 May
30 Jun
0 wk
Common thyme
Thymus vulgaris
19 Mar – 2 Apr
10 May
8-10 wk
28 May
5 Jul
0 wk
Oregano
Origanum vulgare
2 – 16 Apr
24 May
6-8 wk
28 May
5 Jul
0 wk
2 Jul
5 wk after
Parsley
Petroselinum crispum
2 – 16 Apr
24 May
6-8 wk
28 May
5 Jul
0 wk
1 Jun
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
21 Feb – 21 Mar
20 Mar
10-14 wk
30 May
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
6 – 13 May
29 May
3-4 wk
3 Jun
19 Jun
1 wk after
Cornflower
Centaurea cyanus
28 May
15 Jul
0 wk
1 Jun
5 Jul
1 wk after
Statice
Limonium sinuatum
Fleece
25 Mar – 8 Apr
19 Apr
8-10 wk
3 Jun
14 Jun
1 wk after
Sweet William
Dianthus barbatus
2 – 16 Apr
6-8 wk
28 May
0 wk
13 Jun
2 wk after
Snow-on-the-mountain
Euphorbia marginata
Fleece
8 – 22 Apr
3 May
6-8 wk
3 Jun
14 Jun
1 wk after
26 Jul
8 wk after
Pinnate dahlia
Dahlia × pinnata
13 – 27 Apr
28 Apr
6-8 wk
8 Jun
9 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
23 Apr – 21 May
21 May
4-8 wk
18 Jun
18 Jun
3 wk after
18 Jun
3 wk after
Foxglove
Digitalis purpurea
19 Mar – 2 Apr
8-10 wk
28 May
0 wk
18 Jun
3 wk after
Busy lizzie
Impatiens walleriana
Fleece
18 Mar – 15 Apr
9 Jun
8-12 wk
10 Jun
4 Aug
2 wk after
Creeping zinnia
Sanvitalia procumbens
Fleece
8 – 22 Apr
13 May
6-8 wk
3 Jun
24 Jun
1 wk after
Hyacinth bean
Dolichos lablab
Season too short
29 Apr – 13 May
4-6 wk
10 Jun
2 wk after
Chinese lantern
Physalis alkekengi
21 Mar – 4 Apr
4 Apr
8-10 wk
30 May
30 May
0 wk
Love in a mist
Nigella damascena
28 May
30 Jun
0 wk
1 Jun
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
Fleece
8 – 22 Apr
23 Apr
6-8 wk
3 Jun
4 Jun
1 wk after
26 Jul
8 wk after
Purple-top vervain
Verbena bonariensis
7 Mar – 4 Apr
4 Apr
8-12 wk
30 May
30 May
0 wk
Cardoon
Cynara cardunculus
Greenhouse
5 Mar – 2 Apr
21 Mar
8-12 wk
28 May
0 wk
Regal-foxtail
Ptilotus nobilis
Greenhouse
11 Mar – 8 Apr
14 Apr
8-12 wk
3 Jun
9 Jun
1 wk after
Globe amaranth
Gomphrena globosa
Greenhouse
8 – 22 Apr
28 Apr
6-8 wk
3 Jun
9 Jun
1 wk after
Corn poppy
Papaver rhoeas
28 May
15 Jul
0 wk
1 Jun
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
5 Mar – 2 Apr
10 May
8-12 wk
28 May
5 Jul
0 wk
13 Jun
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
Fleece
1 – 15 Apr
29 Apr
8-10 wk
10 Jun
24 Jun
2 wk after
Sweet pea
Lathyrus odoratus
2 – 23 Apr
31 May
5-8 wk
28 May
5 Jul
0 wk
Stock
Matthiola incana
2 – 16 Apr
3 Jun
6-8 wk
28 May
15 Jul
0 wk
18 Jun
5 Jul
3 wk after
Wormwood
Artemisia absinthium
2 – 16 Apr
4 May
6-8 wk
28 May
15 Jun
0 wk
18 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
Greenhouse
22 Apr – 6 May
7 May
4-6 wk
3 Jun
4 Jun
1 wk after
Garden pansy
Viola × wittrockiana
19 Mar – 2 Apr
20 May
8-10 wk
28 May
15 Jul
0 wk
13 Jun
5 Jul
2 wk after
Petunia
Petunia
Fleece
11 Mar – 8 Apr
19 Apr
8-12 wk
3 Jun
14 Jun
1 wk after
Sweet Scabious
Scabiosa atropurpurea
4 – 18 Apr
18 Apr
6-8 wk
30 May
30 May
0 wk
16 Jul
7 wk after
Common zinnia
Zinnia elegans
Fleece
22 Apr – 6 May
22 May
4-6 wk
3 Jun
19 Jun
1 wk after
Common morning glory
Ipomoea purpurea
Greenhouse
29 Apr – 13 May
29 May
3-5 wk
3 Jun
19 Jun
1 wk after
Garden cosmos
Cosmos bipinnatus
Fleece
22 Apr – 6 May
21 May
4-6 wk
3 Jun
18 Jun
1 wk after
2 Jul
5 wk after
Scarlet milkweed
Asclepias curassavica
Greenhouse
18 Mar – 15 Apr
14 May
8-12 wk
10 Jun
9 Jul
2 wk after
Bee balm
Monarda didyma
5 Mar – 2 Apr
20 Apr
8-12 wk
28 May
15 Jun
0 wk
2 Jul
5 wk after
Yarrow
Achillea millefolium
2 – 16 Apr
4 Apr
6-8 wk
28 May
0 wk
18 Jun
3 wk after
Safflower
Carthamus tinctorius
28 May
15 Jun
0 wk
1 Jun
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
2 – 16 Apr
24 May
6-8 wk
28 May
5 Jul
0 wk
10 May
25 Jun
3 wk before
Bishop's flower
Ammi majus
16 – 30 Apr
7 Jun
4-6 wk
28 May
5 Jul
0 wk
18 Jun
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
Season too short
11 – 25 Mar
20 Mar
10-12 wk
3 Jun
1 wk after
Sunflower
Helianthus annuus
13 – 20 May
28 May
3-4 wk
10 Jun
18 Jun
2 wk after
2 Jul
5 wk after
China aster
Callistephus chinensis
15 – 29 Apr
17 May
6-8 wk
10 Jun
28 Jun
2 wk after
16 Jul
7 wk after
Annual phlox
Phlox drummondii
Fleece
2 – 16 Apr
13 May
6-8 wk
28 May
24 Jun
0 wk
2 Jul
5 wk after
Hollyhock
Alcea rosea
2 – 16 Apr
6-8 wk
28 May
0 wk
18 Jun
3 wk after
Alpine delphinium
Delphinium elatum
5 Mar – 2 Apr
20 Apr
8-12 wk
28 May
15 Jun
0 wk
2 Jul
5 wk after
African marigold
Tagetes erecta
Fleece
8 – 22 Apr
13 May
6-8 wk
3 Jun
24 Jun
1 wk after
Black-eyed Susan
Rudbeckia hirta
4 – 18 Apr
7 May
6-8 wk
30 May
18 Jun
0 wk
16 Jul
7 wk after
Wood sage
Salvia nemorosa
19 Mar – 2 Apr
10 Apr
8-10 wk
28 May
5 Jun
0 wk
2 Jul
5 wk after
Black-eyed susan vine
Thunbergia alata
Greenhouse
25 Mar – 22 Apr
8 May
6-10 wk
3 Jun
19 Jun
1 wk after
California goldenpoppy
Eschscholzia californica
28 May
9 Jul
0 wk
1 Jun
29 Jun
1 wk after
Painted tongue
Salpiglossis sinuata
Fleece
25 Mar – 8 Apr
24 Apr
8-10 wk
3 Jun
19 Jun
1 wk after
Water forget-me-not
Myosotis scorpioides
2 – 16 Apr
4 May
6-8 wk
28 May
15 Jun
0 wk
18 Jun
3 wk after