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No frost in sight Last frost normally in 1 days (10 May), but frost-free in the forecast.
Method
Rel. frost
Last spring frost (0°C) 10 May Normal year · 20 years of data
Frost-free season 163 days 10 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)
22 Mar – 5 Apr
12 Jun
5-7 wk
10 May
17 Jul
0 wk
11 May
7 Jul
0 wk
Broccoli
Brassica oleracea (Italica-gruppen)
29 Mar – 12 Apr
24 Jun
4-6 wk
10 May
22 Jul
0 wk
11 May
12 Jul
0 wk
Chili pepper
Capsicum annuum
Fleece
7 Mar – 4 Apr
13 Apr
8-12 wk
30 May
8 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
22 Mar – 5 Apr
7 Jun
5-7 wk
10 May
12 Jul
0 wk
10 May
2 Jul
0 wk
Garden cucumber
Cucumis sativus
16 – 23 May
7 Jun
3-4 wk
13 Jun
28 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
9 – 16 May
4 Jun
4-5 wk
13 Jun
2 Jul
5 wk after
22 Jun
22 Jun
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
23 – 30 May
27 May
3-4 wk
20 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
15 Feb – 15 Mar
25 Mar
8-12 wk
10 May
20 May
0 wk
23 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
11 May
9 Jun
0 wk
11 May
30 May
0 wk
Maize
Zea mays
2 – 9 May
28 May
3-4 wk
30 May
18 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
18 – 25 Apr
1 Jul
3-4 wk
16 May
22 Jul
1 wk after
23 May
12 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
10 May
2 Jul
0 wk
10 May
22 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
22 Mar – 5 Apr
7 Jun
5-7 wk
10 May
12 Jul
0 wk
10 May
2 Jul
0 wk
Potato
Solanum tuberosum
8 – 22 Apr
24 May
4-6 wk
20 May
21 Jun
1 wk after
20 May
11 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
22 Mar – 5 Apr
17 Jun
5-7 wk
10 May
22 Jul
0 wk
11 May
12 Jul
0 wk
Pumpkin
Cucurbita pepo
16 – 23 May
21 Jun
3-4 wk
13 Jun
12 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
18 – 25 Apr
9 Jun
3-4 wk
16 May
30 Jun
1 wk after
23 May
20 Jun
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
29 Mar – 12 Apr
19 Jun
4-6 wk
10 May
17 Jul
0 wk
Lettuce
Lactuca sativa
12 – 19 Apr
6 Jul
3-4 wk
10 May
27 Jul
0 wk
11 May
17 Jul
0 wk
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
29 Mar – 12 Apr
19 Jun
4-6 wk
10 May
17 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
12 – 26 Apr
29 May
2-4 wk
10 May
12 Jun
0 wk
10 May
2 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
11 May
9 Jun
0 wk
11 May
30 May
0 wk
Spinach
Spinacia oleracea
12 – 19 Apr
21 Jul
3-4 wk
10 May
11 Aug
0 wk
7 May
1 Aug
0 wk
Sweet potato
Ipomoea batatas
4 – 18 Jun
4-6 wk
16 Jul
10 wk after
Garden tomato
Solanum lycopersicum
4 – 18 Apr
7 May
6-8 wk
30 May
18 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
2 – 16 May
23 Jun
2-4 wk
30 May
7 Jul
3 wk after
22 Jun
27 Jun
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
29 Mar – 12 Apr
19 Jun
4-6 wk
10 May
17 Jul
0 wk
Garden pea
Pisum sativum
12 – 19 Apr
21 Jun
3-4 wk
10 May
12 Jul
0 wk
11 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
2 – 16 May
30 May
4-6 wk
13 Jun
27 Jun
5 wk after
Lemon balm
Melissa officinalis
1 – 15 Mar
17 May
8-10 wk
10 May
12 Jul
0 wk
4 Jun
2 Jul
4 wk after
Dill
Anethum graveolens
11 May
22 Jul
0 wk
Wild chives
Allium schoenoprasum
15 – 29 Mar
31 May
6-8 wk
10 May
12 Jul
0 wk
11 May
2 Jul
0 wk
Spearmint
Mentha spicata
15 Feb – 15 Mar
17 May
8-12 wk
10 May
12 Jul
0 wk
4 Jun
2 Jul
4 wk after
Coriander
Coriandrum sativum
10 May
11 Aug
0 wk
23 May
1 Aug
2 wk after
Garden sage
Salvia officinalis
7 – 21 Mar
2 May
8-10 wk
16 May
27 Jun
1 wk after
Common thyme
Thymus vulgaris
1 – 15 Mar
7 May
8-10 wk
10 May
2 Jul
0 wk
Oregano
Origanum vulgare
15 – 29 Mar
21 May
6-8 wk
10 May
2 Jul
0 wk
4 Jun
22 Jun
4 wk after
Parsley
Petroselinum crispum
15 – 29 Mar
21 May
6-8 wk
10 May
2 Jul
0 wk
11 May
22 Jun
0 wk
Rosemary
Salvia rosmarinus
7 Feb – 7 Mar
3 Apr
10-14 wk
16 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
16 – 23 May
6 Jun
3-4 wk
13 Jun
27 Jun
5 wk after
Cornflower
Centaurea cyanus
10 May
12 Jul
0 wk
11 May
2 Jul
0 wk
Statice
Limonium sinuatum
21 Mar – 4 Apr
7 May
8-10 wk
30 May
2 Jul
3 wk after
Sweet William
Dianthus barbatus
15 – 29 Mar
6-8 wk
10 May
0 wk
20 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
4 – 18 Apr
21 May
6-8 wk
30 May
2 Jul
3 wk after
16 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
30 Mar – 13 Apr
21 May
6-8 wk
25 May
2 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
9 Apr – 7 May
4 Jun
4-8 wk
4 Jun
2 Jul
4 wk after
4 Jun
22 Jun
4 wk after
Foxglove
Digitalis purpurea
1 – 15 Mar
8-10 wk
10 May
0 wk
23 May
2 wk after
Busy lizzie
Impatiens walleriana
21 Mar – 18 Apr
27 Jun
8-12 wk
13 Jun
22 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
4 – 18 Apr
31 May
6-8 wk
30 May
12 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
18 Apr – 2 May
10 May
4-6 wk
30 May
7 Jun
3 wk after
Chinese lantern
Physalis alkekengi
7 – 21 Mar
17 Apr
8-10 wk
16 May
12 Jun
1 wk after
Love in a mist
Nigella damascena
10 May
27 Jun
0 wk
11 May
17 Jun
0 wk
Strawflower
Xerochrysum bracteatum
4 – 18 Apr
11 May
6-8 wk
30 May
22 Jun
3 wk after
16 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
21 Feb – 21 Mar
17 Apr
8-12 wk
16 May
12 Jun
1 wk after
Cardoon
Cynara cardunculus
7 Mar – 4 Apr
18 Mar
8-12 wk
30 May
3 wk after
Regal-foxtail
Ptilotus nobilis
21 Mar – 18 Apr
22 Apr
8-12 wk
13 Jun
17 Jun
5 wk after
Globe amaranth
Gomphrena globosa
18 Apr – 2 May
6 May
6-8 wk
13 Jun
17 Jun
5 wk after
Corn poppy
Papaver rhoeas
10 May
12 Jul
0 wk
11 May
2 Jul
0 wk
Snapdragon
Antirrhinum majus
15 Feb – 15 Mar
7 May
8-12 wk
10 May
2 Jul
0 wk
20 May
22 Jun
1 wk after
Flossflower
Ageratum houstonianum
4 – 18 Apr
17 May
8-10 wk
13 Jun
12 Jul
5 wk after
Sweet pea
Lathyrus odoratus
15 Mar – 5 Apr
28 May
5-8 wk
10 May
2 Jul
0 wk
Stock
Matthiola incana
15 – 29 Mar
31 May
6-8 wk
10 May
12 Jul
0 wk
23 May
2 Jul
2 wk after
Wormwood
Artemisia absinthium
15 – 29 Mar
1 May
6-8 wk
10 May
12 Jun
0 wk
23 May
2 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
2 – 16 May
15 May
4-6 wk
13 Jun
5 wk after
Garden pansy
Viola × wittrockiana
1 – 15 Mar
17 May
8-10 wk
10 May
12 Jul
0 wk
20 May
2 Jul
1 wk after
Petunia
Petunia
7 Mar – 4 Apr
7 May
8-12 wk
30 May
2 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
21 Mar – 4 Apr
1 May
6-8 wk
16 May
12 Jun
1 wk after
22 Jun
6 wk after
Common zinnia
Zinnia elegans
18 Apr – 2 May
9 Jun
4-6 wk
30 May
7 Jul
3 wk after
Common morning glory
Ipomoea purpurea
9 – 23 May
6 Jun
3-5 wk
13 Jun
27 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
18 Apr – 2 May
4 Jun
4-6 wk
30 May
2 Jul
3 wk after
22 Jun
22 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
2 – 30 Apr
22 May
8-12 wk
25 Jun
17 Jul
7 wk after
Bee balm
Monarda didyma
15 Feb – 15 Mar
17 Apr
8-12 wk
10 May
12 Jun
0 wk
4 Jun
4 wk after
Yarrow
Achillea millefolium
15 – 29 Mar
1 Apr
6-8 wk
10 May
13 May
0 wk
23 May
2 wk after
Safflower
Carthamus tinctorius
10 May
12 Jun
0 wk
11 May
2 Jun
0 wk
Iceland poppy
Papaver nudicaule
Season too short
15 – 29 Mar
21 May
6-8 wk
10 May
2 Jul
0 wk
24 Apr
22 Jun
2 wk before
Bishop's flower
Ammi majus
29 Mar – 12 Apr
4 Jun
4-6 wk
10 May
2 Jul
0 wk
23 May
22 Jun
2 wk after
Drumsticks
Pycnosorus globosus
21 Mar – 4 Apr
29 Mar
10-12 wk
13 Jun
5 wk after
Sunflower
Helianthus annuus
2 – 9 May
11 Jun
3-4 wk
30 May
2 Jul
3 wk after
4 Jun
22 Jun
4 wk after
China aster
Callistephus chinensis
4 – 18 Apr
31 May
6-8 wk
30 May
12 Jul
3 wk after
22 Jun
2 Jul
6 wk after
Annual phlox
Phlox drummondii
26 Mar – 9 Apr
31 May
6-8 wk
21 May
12 Jul
2 wk after
22 Jun
2 Jul
6 wk after
Hollyhock
Alcea rosea
15 – 29 Mar
6-8 wk
10 May
0 wk
23 May
2 wk after
Alpine delphinium
Delphinium elatum
15 Feb – 15 Mar
17 Apr
8-12 wk
10 May
12 Jun
0 wk
4 Jun
4 wk after
African marigold
Tagetes erecta
4 – 18 Apr
31 May
6-8 wk
30 May
12 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
21 Mar – 4 Apr
21 May
6-8 wk
16 May
2 Jul
1 wk after
22 Jun
22 Jun
6 wk after
Wood sage
Salvia nemorosa
1 – 15 Mar
7 Apr
8-10 wk
10 May
2 Jun
0 wk
4 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
4 Apr – 2 May
16 May
6-10 wk
13 Jun
27 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
10 May
12 Jul
0 wk
11 May
2 Jul
0 wk
Painted tongue
Salpiglossis sinuata
21 Mar – 4 Apr
7 May
8-10 wk
30 May
2 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
15 – 29 Mar
1 May
6-8 wk
10 May
12 Jun
0 wk
23 May
2 Jun
2 wk after