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Rel. frost
Last spring frost (0°C) 7 May Normal year · 20 years of data
Frost-free season 166 days 7 May – 20 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
12 Jun
5-7 wk
7 May
17 Jul
0 wk
8 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
26 Mar – 9 Apr
24 Jun
4-6 wk
7 May
22 Jul
0 wk
8 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Fleece
4 Mar – 1 Apr
13 Apr
8-12 wk
27 May
8 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
19 Mar – 2 Apr
7 Jun
5-7 wk
7 May
12 Jul
0 wk
7 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
13 – 20 May
7 Jun
3-4 wk
10 Jun
28 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
6 – 13 May
4 Jun
4-5 wk
10 Jun
2 Jul
5 wk after
19 Jun
22 Jun
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
20 – 27 May
27 May
3-4 wk
17 Jun
17 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
12 Feb – 12 Mar
25 Mar
8-12 wk
7 May
20 May
0 wk
20 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
8 May
9 Jun
0 wk
8 May
30 May
0 wk
Maize
Zea mays
29 Apr – 6 May
28 May
3-4 wk
27 May
18 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
15 – 22 Apr
1 Jul
3-4 wk
13 May
22 Jul
1 wk after
20 May
12 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
7 May
2 Jul
0 wk
7 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
19 Mar – 2 Apr
7 Jun
5-7 wk
7 May
12 Jul
0 wk
7 May
2 Jul
0 wk
Potato
Solanum tuberosum
5 – 19 Apr
25 May
4-6 wk
17 May
22 Jun
1 wk after
17 May
12 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
19 Mar – 2 Apr
17 Jun
5-7 wk
7 May
22 Jul
0 wk
8 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
13 – 20 May
21 Jun
3-4 wk
10 Jun
12 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
15 – 22 Apr
9 Jun
3-4 wk
13 May
30 Jun
1 wk after
20 May
20 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
26 Mar – 9 Apr
19 Jun
4-6 wk
7 May
17 Jul
0 wk
Lettuce
Lactuca sativa
9 – 16 Apr
6 Jul
3-4 wk
7 May
27 Jul
0 wk
8 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
26 Mar – 9 Apr
19 Jun
4-6 wk
7 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
9 – 23 Apr
29 May
2-4 wk
7 May
12 Jun
0 wk
7 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
8 May
9 Jun
0 wk
8 May
30 May
0 wk
Spinach
Spinacia oleracea
9 – 16 Apr
21 Jul
3-4 wk
7 May
11 Aug
0 wk
4 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
1 – 15 Jun
4-6 wk
13 Jul
10 wk after
Garden tomato
Solanum lycopersicum
1 – 15 Apr
7 May
6-8 wk
27 May
18 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
29 Apr – 13 May
23 Jun
2-4 wk
27 May
7 Jul
3 wk after
19 Jun
27 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
26 Mar – 9 Apr
19 Jun
4-6 wk
7 May
17 Jul
0 wk
Garden pea
Pisum sativum
9 – 16 Apr
21 Jun
3-4 wk
7 May
12 Jul
0 wk
8 May
2 Jul
0 wk

Herbs

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