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Rel. frost
Last spring frost (0°C) 7 May Normal year · 20 years of data
Frost-free season 154 days 7 May – 8 Oct

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
19 Mar – 2 Apr
9 Jun
5-7 wk
7 May
14 Jul
0 wk
8 May
4 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
26 Mar – 9 Apr
21 Jun
4-6 wk
7 May
19 Jul
0 wk
8 May
9 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
22 Feb – 22 Mar
22 Mar
8-12 wk
17 May
17 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
19 Mar – 2 Apr
4 Jun
5-7 wk
7 May
9 Jul
0 wk
7 May
29 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
19 – 26 Apr
13 Jun
3-4 wk
17 May
4 Jul
1 wk after
Florence Fennel
Foeniculum vulgare
8 – 15 May
1 Jun
4-5 wk
12 Jun
29 Jun
5 wk after
19 Jun
19 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
20 – 27 May
3-4 wk
17 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
12 Feb – 12 Mar
5 Mar
8-12 wk
7 May
0 wk
20 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Fleece
4 May
28 May
0 wk
4 May
18 May
0 wk
Maize
Zea mays
Fleece
19 – 26 Apr
6 May
3-4 wk
17 May
27 May
1 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
14 – 21 Apr
28 Jun
3-4 wk
12 May
19 Jul
1 wk after
20 May
9 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
7 May
29 Jun
0 wk
7 May
19 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
19 Mar – 2 Apr
4 Jun
5-7 wk
7 May
9 Jul
0 wk
7 May
29 Jun
0 wk
Potato
Solanum tuberosum
Fleece
27 Mar – 10 Apr
12 May
4-6 wk
8 May
9 Jun
0 wk
8 May
30 May
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
19 Mar – 2 Apr
14 Jun
5-7 wk
7 May
19 Jul
0 wk
8 May
9 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
29 Apr – 6 May
18 Jun
3-4 wk
27 May
9 Jul
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
14 – 21 Apr
2 May
3-4 wk
12 May
23 May
1 wk after
20 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
26 Mar – 9 Apr
16 Jun
4-6 wk
7 May
14 Jul
0 wk
Lettuce
Lactuca sativa
9 – 16 Apr
3 Jul
3-4 wk
7 May
24 Jul
0 wk
8 May
14 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
26 Mar – 9 Apr
16 Jun
4-6 wk
7 May
14 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
9 – 23 Apr
10 May
2-4 wk
7 May
24 May
0 wk
7 May
14 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Fleece
4 May
28 May
0 wk
4 May
18 May
0 wk
Spinach
Spinacia oleracea
9 – 16 Apr
18 Jul
3-4 wk
7 May
8 Aug
0 wk
4 May
29 Jul
0 wk
Sweet potato
Ipomoea batatas
1 – 15 Jun
4-6 wk
13 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Fleece
22 Mar – 5 Apr
15 Apr
6-8 wk
17 May
27 May
1 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
19 Apr – 3 May
20 Jun
2-4 wk
17 May
4 Jul
1 wk after
1 Jun
24 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
26 Mar – 9 Apr
16 Jun
4-6 wk
7 May
14 Jul
0 wk
Garden pea
Pisum sativum
9 – 16 Apr
18 Jun
3-4 wk
7 May
9 Jul
0 wk
8 May
29 Jun
0 wk

Herbs

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