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Rel. frost
Last spring frost (0°C) 1 May Normal year · 20 years of data
Frost-free season 173 days 1 May – 21 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)
13 – 27 Mar
21 Jun
5-7 wk
1 May
26 Jul
0 wk
25 Apr
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
20 Mar – 3 Apr
3 Jul
4-6 wk
1 May
31 Jul
0 wk
25 Apr
21 Jul
1 wk before
Chili pepper
Capsicum annuum
14 Mar – 11 Apr
22 Apr
8-12 wk
6 Jun
17 Jun
5 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
13 – 27 Mar
16 Jun
5-7 wk
1 May
21 Jul
0 wk
18 Apr
11 Jul
2 wk before
Garden cucumber
Cucumis sativus
9 – 16 May
22 Jun
3-4 wk
6 Jun
13 Jul
5 wk after
Florence Fennel
Foeniculum vulgare
2 – 9 May
13 Jun
4-5 wk
6 Jun
11 Jul
5 wk after
11 Jun
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Fleece
4 – 11 Jun
3-4 wk
2 Jul
9 wk after
Onion
Allium cepa (Cepa-gruppen)
6 Feb – 6 Mar
6 Apr
8-12 wk
1 May
1 Jun
0 wk
14 May
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
25 Apr
21 Jun
1 wk before
25 Apr
11 Jun
1 wk before
Maize
Zea mays
25 Apr – 2 May
12 Jun
3-4 wk
23 May
3 Jul
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
10 – 17 Apr
10 Jul
3-4 wk
8 May
31 Jul
1 wk after
14 May
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
1 May
11 Jul
0 wk
18 Apr
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
13 – 27 Mar
16 Jun
5-7 wk
1 May
21 Jul
0 wk
18 Apr
11 Jul
2 wk before
Potato
Solanum tuberosum
25 Mar – 8 Apr
13 Jun
4-6 wk
6 May
11 Jul
1 wk after
6 May
1 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
13 – 27 Mar
26 Jun
5-7 wk
1 May
31 Jul
0 wk
25 Apr
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
9 – 16 May
6 Jul
3-4 wk
6 Jun
27 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
10 – 17 Apr
30 Jun
3-4 wk
8 May
21 Jul
1 wk after
14 May
11 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
20 Mar – 3 Apr
28 Jun
4-6 wk
1 May
26 Jul
0 wk
Lettuce
Lactuca sativa
3 – 10 Apr
15 Jul
3-4 wk
1 May
5 Aug
0 wk
25 Apr
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
20 Mar – 3 Apr
28 Jun
4-6 wk
1 May
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
21 Mar – 4 Apr
7 Jun
2-4 wk
18 Apr
21 Jun
2 wk before
18 Apr
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
25 Apr
21 Jun
1 wk before
25 Apr
11 Jun
1 wk before
Spinach
Spinacia oleracea
3 – 10 Apr
30 Jul
3-4 wk
1 May
20 Aug
0 wk
11 Apr
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
2 – 16 Jun
4-6 wk
14 Jul
11 wk after
Garden tomato
Solanum lycopersicum
28 Mar – 11 Apr
22 May
6-8 wk
23 May
3 Jul
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
25 Apr – 9 May
8 Jul
2-4 wk
23 May
22 Jul
3 wk after
11 Jun
12 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
20 Mar – 3 Apr
28 Jun
4-6 wk
1 May
26 Jul
0 wk
Garden pea
Pisum sativum
3 – 10 Apr
30 Jun
3-4 wk
1 May
21 Jul
0 wk
25 Apr
11 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
25 Apr – 9 May
14 Jun
4-6 wk
6 Jun
12 Jul
5 wk after
Lemon balm
Melissa officinalis
20 Feb – 6 Mar
26 May
8-10 wk
1 May
21 Jul
0 wk
27 May
11 Jul
4 wk after
Dill
Anethum graveolens
25 Apr
31 Jul
1 wk before
Wild chives
Allium schoenoprasum
6 – 20 Mar
9 Jun
6-8 wk
1 May
21 Jul
0 wk
25 Apr
11 Jul
1 wk before
Spearmint
Mentha spicata
6 Feb – 6 Mar
26 May
8-12 wk
1 May
21 Jul
0 wk
27 May
11 Jul
4 wk after
Coriander
Coriandrum sativum
1 May
20 Aug
0 wk
14 May
10 Aug
2 wk after
Garden sage
Salvia officinalis
27 Feb – 13 Mar
11 May
8-10 wk
8 May
6 Jul
1 wk after
Common thyme
Thymus vulgaris
20 Feb – 6 Mar
16 May
8-10 wk
1 May
11 Jul
0 wk
Oregano
Origanum vulgare
6 – 20 Mar
30 May
6-8 wk
1 May
11 Jul
0 wk
27 May
1 Jul
4 wk after
Parsley
Petroselinum crispum
6 – 20 Mar
30 May
6-8 wk
1 May
11 Jul
0 wk
25 Apr
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
30 Jan – 27 Feb
12 Apr
10-14 wk
8 May
21 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
9 – 16 May
21 Jun
3-4 wk
6 Jun
12 Jul
5 wk after
Cornflower
Centaurea cyanus
1 May
21 Jul
0 wk
25 Apr
11 Jul
1 wk before
Statice
Limonium sinuatum
14 – 28 Mar
16 May
8-10 wk
23 May
11 Jul
3 wk after
Sweet William
Dianthus barbatus
6 – 20 Mar
6-8 wk
1 May
0 wk
6 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
28 Mar – 11 Apr
30 May
6-8 wk
23 May
11 Jul
3 wk after
14 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
21 Mar – 4 Apr
30 May
6-8 wk
16 May
11 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
1 – 29 Apr
13 Jun
4-8 wk
27 May
11 Jul
4 wk after
27 May
1 Jul
4 wk after
Foxglove
Digitalis purpurea
20 Feb – 6 Mar
8-10 wk
1 May
0 wk
14 May
2 wk after
Busy lizzie
Impatiens walleriana
14 Mar – 11 Apr
11 Jul
8-12 wk
6 Jun
5 Sep
5 wk after
Creeping zinnia
Sanvitalia procumbens
28 Mar – 11 Apr
9 Jun
6-8 wk
23 May
21 Jul
3 wk after
Hyacinth bean
Dolichos lablab
12 – 26 May
4-6 wk
23 Jun
8 wk after
Chinese lantern
Physalis alkekengi
27 Feb – 13 Mar
26 Apr
8-10 wk
8 May
21 Jun
1 wk after
Love in a mist
Nigella damascena
1 May
6 Jul
0 wk
25 Apr
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
28 Mar – 11 Apr
20 May
6-8 wk
23 May
1 Jul
3 wk after
14 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
13 Feb – 13 Mar
26 Apr
8-12 wk
8 May
21 Jun
1 wk after
Cardoon
Cynara cardunculus
28 Feb – 28 Mar
27 Mar
8-12 wk
23 May
3 wk after
Regal-foxtail
Ptilotus nobilis
14 Mar – 11 Apr
7 May
8-12 wk
6 Jun
2 Jul
5 wk after
Globe amaranth
Gomphrena globosa
11 – 25 Apr
21 May
6-8 wk
6 Jun
2 Jul
5 wk after
Corn poppy
Papaver rhoeas
1 May
21 Jul
0 wk
25 Apr
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
6 Feb – 6 Mar
16 May
8-12 wk
1 May
11 Jul
0 wk
6 May
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
28 Mar – 11 Apr
26 May
8-10 wk
6 Jun
21 Jul
5 wk after
Sweet pea
Lathyrus odoratus
6 – 27 Mar
6 Jun
5-8 wk
1 May
11 Jul
0 wk
Stock
Matthiola incana
6 – 20 Mar
9 Jun
6-8 wk
1 May
21 Jul
0 wk
14 May
11 Jul
2 wk after
Wormwood
Artemisia absinthium
6 – 20 Mar
10 May
6-8 wk
1 May
21 Jun
0 wk
14 May
11 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
25 Apr – 9 May
30 May
4-6 wk
6 Jun
27 Jun
5 wk after
Garden pansy
Viola × wittrockiana
20 Feb – 6 Mar
26 May
8-10 wk
1 May
21 Jul
0 wk
6 May
11 Jul
1 wk after
Petunia
Petunia
28 Feb – 28 Mar
16 May
8-12 wk
23 May
11 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
13 – 27 Mar
10 May
6-8 wk
8 May
21 Jun
1 wk after
11 Jun
11 Jun
6 wk after
Common zinnia
Zinnia elegans
11 – 25 Apr
23 Jun
4-6 wk
23 May
21 Jul
3 wk after
Common morning glory
Ipomoea purpurea
2 – 16 May
21 Jun
3-5 wk
6 Jun
12 Jul
5 wk after
Garden cosmos
Cosmos bipinnatus
11 – 25 Apr
13 Jun
4-6 wk
23 May
11 Jul
3 wk after
11 Jun
1 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
31 Mar – 28 Apr
6 Jun
8-12 wk
23 Jun
1 Aug
8 wk after
Bee balm
Monarda didyma
6 Feb – 6 Mar
26 Apr
8-12 wk
1 May
21 Jun
0 wk
27 May
11 Jun
4 wk after
Yarrow
Achillea millefolium
6 – 20 Mar
10 Apr
6-8 wk
1 May
22 May
0 wk
14 May
2 wk after
Safflower
Carthamus tinctorius
1 May
21 Jun
0 wk
25 Apr
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
6 – 20 Mar
30 May
6-8 wk
1 May
11 Jul
0 wk
16 Mar
1 Jul
7 wk before
Bishop's flower
Ammi majus
20 Mar – 3 Apr
13 Jun
4-6 wk
1 May
11 Jul
0 wk
14 May
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
14 – 28 Mar
12 Apr
10-12 wk
6 Jun
21 Jun
5 wk after
Sunflower
Helianthus annuus
25 Apr – 2 May
20 Jun
3-4 wk
23 May
11 Jul
3 wk after
27 May
1 Jul
4 wk after
China aster
Callistephus chinensis
28 Mar – 11 Apr
9 Jun
6-8 wk
23 May
21 Jul
3 wk after
11 Jun
11 Jul
6 wk after
Annual phlox
Phlox drummondii
19 Mar – 2 Apr
9 Jun
6-8 wk
14 May
21 Jul
2 wk after
11 Jun
11 Jul
6 wk after
Hollyhock
Alcea rosea
6 – 20 Mar
6-8 wk
1 May
0 wk
14 May
2 wk after
Alpine delphinium
Delphinium elatum
6 Feb – 6 Mar
26 Apr
8-12 wk
1 May
21 Jun
0 wk
27 May
11 Jun
4 wk after
African marigold
Tagetes erecta
28 Mar – 11 Apr
9 Jun
6-8 wk
23 May
21 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
13 – 27 Mar
30 May
6-8 wk
8 May
11 Jul
1 wk after
11 Jun
1 Jul
6 wk after
Wood sage
Salvia nemorosa
20 Feb – 6 Mar
16 Apr
8-10 wk
1 May
11 Jun
0 wk
27 May
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
28 Mar – 25 Apr
31 May
6-10 wk
6 Jun
12 Jul
5 wk after
California goldenpoppy
Eschscholzia californica
1 May
21 Jul
0 wk
25 Apr
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
14 – 28 Mar
16 May
8-10 wk
23 May
11 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
6 – 20 Mar
10 May
6-8 wk
1 May
21 Jun
0 wk
14 May
11 Jun
2 wk after