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Rel. frost
Last spring frost (0°C) 8 May Normal year · 20 years of data
Frost-free season 163 days 8 May – 18 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)
20 Mar – 3 Apr
9 Jun
5-7 wk
8 May
14 Jul
0 wk
9 May
4 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
27 Mar – 10 Apr
21 Jun
4-6 wk
8 May
19 Jul
0 wk
9 May
9 Jul
0 wk
Chili pepper
Capsicum annuum
Season too short
23 Feb – 23 Mar
8-12 wk
18 May
1 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
20 Mar – 3 Apr
4 Jun
5-7 wk
8 May
9 Jul
0 wk
8 May
29 Jun
0 wk
Garden cucumber
Cucumis sativus
Greenhouse
20 – 27 Apr
15 Jun
3-4 wk
18 May
6 Jul
1 wk after
Florence Fennel
Foeniculum vulgare
9 – 16 May
1 Jun
4-5 wk
13 Jun
29 Jun
5 wk after
20 Jun
6 wk after
Butter bean
Phaseolus lunatus
Season too short
21 – 28 May
3-4 wk
18 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
13 Feb – 13 Mar
10 Mar
8-12 wk
8 May
0 wk
21 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
Fleece
5 May
5 Jun
0 wk
5 May
26 May
0 wk
Maize
Zea mays
Greenhouse
12 – 19 Apr
5 Jun
3-4 wk
10 May
26 Jun
0 wk
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
15 – 22 Apr
28 Jun
3-4 wk
13 May
19 Jul
1 wk after
21 May
9 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
8 May
29 Jun
0 wk
8 May
19 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
20 Mar – 3 Apr
4 Jun
5-7 wk
8 May
9 Jul
0 wk
8 May
29 Jun
0 wk
Potato
Solanum tuberosum
Fleece
28 Mar – 11 Apr
17 May
4-6 wk
9 May
14 Jun
0 wk
9 May
4 Jun
0 wk
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
20 Mar – 3 Apr
14 Jun
5-7 wk
8 May
19 Jul
0 wk
9 May
9 Jul
0 wk
Pumpkin
Cucurbita pepo
Fleece
30 Apr – 7 May
20 Jun
3-4 wk
28 May
11 Jul
3 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
15 – 22 Apr
6 May
3-4 wk
13 May
27 May
1 wk after
21 May
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
27 Mar – 10 Apr
16 Jun
4-6 wk
8 May
14 Jul
0 wk
Lettuce
Lactuca sativa
10 – 17 Apr
3 Jul
3-4 wk
8 May
24 Jul
0 wk
9 May
14 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
27 Mar – 10 Apr
16 Jun
4-6 wk
8 May
14 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
10 – 24 Apr
16 May
2-4 wk
8 May
30 May
0 wk
8 May
20 May
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
Fleece
5 May
5 Jun
0 wk
5 May
26 May
0 wk
Spinach
Spinacia oleracea
10 – 17 Apr
18 Jul
3-4 wk
8 May
8 Aug
0 wk
5 May
29 Jul
0 wk
Sweet potato
Ipomoea batatas
2 – 16 Jun
4-6 wk
14 Jul
10 wk after
Garden tomato
Solanum lycopersicum
Greenhouse
15 – 29 Mar
15 May
6-8 wk
10 May
26 Jun
0 wk
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
Fleece
20 Apr – 4 May
22 Jun
2-4 wk
18 May
6 Jul
1 wk after
2 Jun
26 Jun
4 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
27 Mar – 10 Apr
16 Jun
4-6 wk
8 May
14 Jul
0 wk
Garden pea
Pisum sativum
10 – 17 Apr
18 Jun
3-4 wk
8 May
9 Jul
0 wk
9 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
16 – 30 Apr
29 May
4-6 wk
28 May
26 Jun
3 wk after
Lemon balm
Melissa officinalis
27 Feb – 13 Mar
14 May
8-10 wk
8 May
9 Jul
0 wk
2 Jun
29 Jun
4 wk after
Dill
Anethum graveolens
9 May
19 Jul
0 wk
Wild chives
Allium schoenoprasum
Season too short
13 – 27 Mar
28 May
6-8 wk
8 May
9 Jul
0 wk
29 Apr
29 Jun
1 wk before
Spearmint
Mentha spicata
13 Feb – 13 Mar
14 May
8-12 wk
8 May
9 Jul
0 wk
2 Jun
29 Jun
4 wk after
Coriander
Coriandrum sativum
8 May
8 Aug
0 wk
21 May
29 Jul
2 wk after
Garden sage
Salvia officinalis
4 – 18 Mar
29 Apr
8-10 wk
13 May
24 Jun
1 wk after
Common thyme
Thymus vulgaris
27 Feb – 13 Mar
4 May
8-10 wk
8 May
29 Jun
0 wk
Oregano
Origanum vulgare
13 – 27 Mar
18 May
6-8 wk
8 May
29 Jun
0 wk
2 Jun
19 Jun
4 wk after
Parsley
Petroselinum crispum
13 – 27 Mar
18 May
6-8 wk
8 May
29 Jun
0 wk
9 May
19 Jun
0 wk
Rosemary
Salvia rosmarinus
4 Feb – 4 Mar
31 Mar
10-14 wk
13 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
30 Apr – 7 May
5 Jun
3-4 wk
28 May
26 Jun
3 wk after
Cornflower
Centaurea cyanus
8 May
9 Jul
0 wk
9 May
29 Jun
0 wk
Statice
Limonium sinuatum
19 Mar – 2 Apr
26 Apr
8-10 wk
28 May
21 Jun
3 wk after
Sweet William
Dianthus barbatus
13 – 27 Mar
6-8 wk
8 May
0 wk
18 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
2 – 16 Apr
10 May
6-8 wk
28 May
21 Jun
3 wk after
14 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
26 Mar – 9 Apr
18 May
6-8 wk
21 May
29 Jun
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
Fleece
26 Mar – 23 Apr
1 Jun
4-8 wk
21 May
29 Jun
2 wk after
21 May
19 Jun
2 wk after
Foxglove
Digitalis purpurea
27 Feb – 13 Mar
8-10 wk
8 May
0 wk
21 May
2 wk after
Busy lizzie
Impatiens walleriana
21 Mar – 18 Apr
16 Jun
8-12 wk
13 Jun
11 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
2 – 16 Apr
20 May
6-8 wk
28 May
1 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Season too short
16 – 30 Apr
29 Apr
4-6 wk
28 May
3 wk after
Chinese lantern
Physalis alkekengi
4 – 18 Mar
14 Apr
8-10 wk
13 May
9 Jun
1 wk after
Love in a mist
Nigella damascena
8 May
24 Jun
0 wk
9 May
14 Jun
0 wk
Strawflower
Xerochrysum bracteatum
2 – 16 Apr
30 Apr
6-8 wk
28 May
11 Jun
3 wk after
14 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
18 Feb – 18 Mar
14 Apr
8-12 wk
13 May
9 Jun
1 wk after
Cardoon
Cynara cardunculus
5 Mar – 2 Apr
15 Mar
8-12 wk
28 May
3 wk after
Regal-foxtail
Ptilotus nobilis
Fleece
5 Mar – 2 Apr
21 Apr
8-12 wk
28 May
16 Jun
3 wk after
Globe amaranth
Gomphrena globosa
Fleece
2 – 16 Apr
5 May
6-8 wk
28 May
16 Jun
3 wk after
Corn poppy
Papaver rhoeas
8 May
9 Jul
0 wk
9 May
29 Jun
0 wk
Snapdragon
Antirrhinum majus
13 Feb – 13 Mar
4 May
8-12 wk
8 May
29 Jun
0 wk
18 May
19 Jun
1 wk after
Flossflower
Ageratum houstonianum
Fleece
19 Mar – 2 Apr
14 May
8-10 wk
28 May
9 Jul
3 wk after
Sweet pea
Lathyrus odoratus
13 Mar – 3 Apr
25 May
5-8 wk
8 May
29 Jun
0 wk
Stock
Matthiola incana
13 – 27 Mar
28 May
6-8 wk
8 May
9 Jul
0 wk
21 May
29 Jun
2 wk after
Wormwood
Artemisia absinthium
13 – 27 Mar
28 Apr
6-8 wk
8 May
9 Jun
0 wk
21 May
30 May
2 wk after
Mexican sunflower
Tithonia rotundifolia
Fleece
16 – 30 Apr
14 May
4-6 wk
28 May
11 Jun
3 wk after
Garden pansy
Viola × wittrockiana
27 Feb – 13 Mar
14 May
8-10 wk
8 May
9 Jul
0 wk
18 May
29 Jun
1 wk after
Petunia
Petunia
5 Mar – 2 Apr
26 Apr
8-12 wk
28 May
21 Jun
3 wk after
Sweet Scabious
Scabiosa atropurpurea
18 Mar – 1 Apr
28 Apr
6-8 wk
13 May
9 Jun
1 wk after
20 Jun
6 wk after
Common zinnia
Zinnia elegans
16 – 30 Apr
29 May
4-6 wk
28 May
26 Jun
3 wk after
Common morning glory
Ipomoea purpurea
Fleece
23 Apr – 7 May
5 Jun
3-5 wk
28 May
26 Jun
3 wk after
Garden cosmos
Cosmos bipinnatus
16 – 30 Apr
1 Jun
4-6 wk
28 May
29 Jun
3 wk after
20 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
Fleece
21 Mar – 18 Apr
21 May
8-12 wk
13 Jun
16 Jul
5 wk after
Bee balm
Monarda didyma
13 Feb – 13 Mar
14 Apr
8-12 wk
8 May
9 Jun
0 wk
2 Jun
4 wk after
Yarrow
Achillea millefolium
13 – 27 Mar
29 Mar
6-8 wk
8 May
10 May
0 wk
21 May
2 wk after
Safflower
Carthamus tinctorius
8 May
9 Jun
0 wk
9 May
30 May
0 wk
Iceland poppy
Papaver nudicaule
Season too short
13 – 27 Mar
18 May
6-8 wk
8 May
29 Jun
0 wk
22 Apr
19 Jun
2 wk before
Bishop's flower
Ammi majus
27 Mar – 10 Apr
1 Jun
4-6 wk
8 May
29 Jun
0 wk
21 May
19 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
5 – 19 Mar
31 Mar
10-12 wk
28 May
9 Jun
3 wk after
Sunflower
Helianthus annuus
30 Apr – 7 May
8 Jun
3-4 wk
28 May
29 Jun
3 wk after
2 Jun
19 Jun
4 wk after
China aster
Callistephus chinensis
2 – 16 Apr
28 May
6-8 wk
28 May
9 Jul
3 wk after
20 Jun
29 Jun
6 wk after
Annual phlox
Phlox drummondii
23 Mar – 6 Apr
20 May
6-8 wk
18 May
1 Jul
1 wk after
20 Jun
21 Jun
6 wk after
Hollyhock
Alcea rosea
13 – 27 Mar
6-8 wk
8 May
0 wk
21 May
2 wk after
Alpine delphinium
Delphinium elatum
13 Feb – 13 Mar
14 Apr
8-12 wk
8 May
9 Jun
0 wk
2 Jun
4 wk after
African marigold
Tagetes erecta
2 – 16 Apr
20 May
6-8 wk
28 May
1 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
18 Mar – 1 Apr
18 May
6-8 wk
13 May
29 Jun
1 wk after
20 Jun
6 wk after
Wood sage
Salvia nemorosa
27 Feb – 13 Mar
4 Apr
8-10 wk
8 May
30 May
0 wk
2 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
Fleece
19 Mar – 16 Apr
15 May
6-10 wk
28 May
26 Jun
3 wk after
California goldenpoppy
Eschscholzia californica
8 May
9 Jul
0 wk
9 May
29 Jun
0 wk
Painted tongue
Salpiglossis sinuata
19 Mar – 2 Apr
4 May
8-10 wk
28 May
29 Jun
3 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
13 – 27 Mar
28 Apr
6-8 wk
8 May
9 Jun
0 wk
8 May
30 May
0 wk