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No frost in sight Last frost normally in 3 days (12 May), but frost-free in the forecast.
Method
Rel. frost
Last spring frost (0°C) 12 May Normal year · 20 years of data
Frost-free season 146 days 12 May – 5 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)
24 Mar – 7 Apr
18 Jun
5-7 wk
12 May
23 Jul
0 wk
5 May
13 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
31 Mar – 14 Apr
30 Jun
4-6 wk
12 May
28 Jul
0 wk
5 May
18 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
8 Mar – 5 Apr
13 Apr
8-12 wk
31 May
8 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
24 Mar – 7 Apr
13 Jun
5-7 wk
12 May
18 Jul
0 wk
30 Apr
8 Jul
2 wk before
Garden cucumber
Cucumis sativus
20 – 27 May
7 Jun
3-4 wk
17 Jun
28 Jun
5 wk after
Florence Fennel
Foeniculum vulgare
13 – 20 May
5 Jun
4-5 wk
17 Jun
3 Jul
5 wk after
17 Jun
23 Jun
5 wk after
Butter bean
Phaseolus lunatus
Greenhouse
27 May – 3 Jun
31 May
3-4 wk
24 Jun
6 wk after
Onion
Allium cepa (Cepa-gruppen)
17 Feb – 17 Mar
3 Apr
8-12 wk
12 May
29 May
0 wk
22 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
5 May
18 Jun
1 wk before
5 May
8 Jun
1 wk before
Maize
Zea mays
3 – 10 May
28 May
3-4 wk
31 May
18 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
20 – 27 Apr
7 Jul
3-4 wk
18 May
28 Jul
1 wk after
22 May
18 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
12 May
8 Jul
0 wk
30 Apr
28 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
24 Mar – 7 Apr
13 Jun
5-7 wk
12 May
18 Jul
0 wk
30 Apr
8 Jul
2 wk before
Potato
Solanum tuberosum
5 – 19 Apr
7 Jun
4-6 wk
17 May
5 Jul
1 wk after
17 May
25 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
24 Mar – 7 Apr
23 Jun
5-7 wk
12 May
28 Jul
0 wk
5 May
18 Jul
1 wk before
Pumpkin
Cucurbita pepo
20 – 27 May
21 Jun
3-4 wk
17 Jun
12 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
20 – 27 Apr
18 Jun
3-4 wk
18 May
9 Jul
1 wk after
22 May
29 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
31 Mar – 14 Apr
25 Jun
4-6 wk
12 May
23 Jul
0 wk
Lettuce
Lactuca sativa
14 – 21 Apr
12 Jul
3-4 wk
12 May
2 Aug
0 wk
5 May
23 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
31 Mar – 14 Apr
25 Jun
4-6 wk
12 May
23 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
2 – 16 Apr
4 Jun
2-4 wk
30 Apr
18 Jun
2 wk before
30 Apr
8 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
5 May
18 Jun
1 wk before
5 May
8 Jun
1 wk before
Spinach
Spinacia oleracea
14 – 21 Apr
27 Jul
3-4 wk
12 May
17 Aug
0 wk
24 Apr
7 Aug
3 wk before
Sweet potato
Ipomoea batatas
8 – 22 Jun
4-6 wk
20 Jul
10 wk after
Garden tomato
Solanum lycopersicum
5 – 19 Apr
7 May
6-8 wk
31 May
18 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
3 – 17 May
23 Jun
2-4 wk
31 May
7 Jul
3 wk after
17 Jun
27 Jun
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
31 Mar – 14 Apr
25 Jun
4-6 wk
12 May
23 Jul
0 wk
Garden pea
Pisum sativum
14 – 21 Apr
27 Jun
3-4 wk
12 May
18 Jul
0 wk
5 May
8 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
6 – 20 May
30 May
4-6 wk
17 Jun
27 Jun
5 wk after
Lemon balm
Melissa officinalis
3 – 17 Mar
23 May
8-10 wk
12 May
18 Jul
0 wk
2 Jun
8 Jul
3 wk after
Dill
Anethum graveolens
5 May
28 Jul
1 wk before
Wild chives
Allium schoenoprasum
17 – 31 Mar
6 Jun
6-8 wk
12 May
18 Jul
0 wk
5 May
8 Jul
1 wk before
Spearmint
Mentha spicata
17 Feb – 17 Mar
23 May
8-12 wk
12 May
18 Jul
0 wk
2 Jun
8 Jul
3 wk after
Coriander
Coriandrum sativum
12 May
17 Aug
0 wk
22 May
7 Aug
1 wk after
Garden sage
Salvia officinalis
9 – 23 Mar
8 May
8-10 wk
18 May
3 Jul
1 wk after
Common thyme
Thymus vulgaris
3 – 17 Mar
13 May
8-10 wk
12 May
8 Jul
0 wk
Oregano
Origanum vulgare
17 – 31 Mar
27 May
6-8 wk
12 May
8 Jul
0 wk
2 Jun
28 Jun
3 wk after
Parsley
Petroselinum crispum
17 – 31 Mar
27 May
6-8 wk
12 May
8 Jul
0 wk
5 May
28 Jun
1 wk before
Rosemary
Salvia rosmarinus
9 Feb – 9 Mar
9 Apr
10-14 wk
18 May
18 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
20 – 27 May
6 Jun
3-4 wk
17 Jun
27 Jun
5 wk after
Cornflower
Centaurea cyanus
12 May
18 Jul
0 wk
5 May
8 Jul
1 wk before
Statice
Limonium sinuatum
22 Mar – 5 Apr
8 May
8-10 wk
31 May
3 Jul
3 wk after
Sweet William
Dianthus barbatus
17 – 31 Mar
6-8 wk
12 May
0 wk
17 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
5 – 19 Apr
22 May
6-8 wk
31 May
3 Jul
3 wk after
20 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
31 Mar – 14 Apr
25 May
6-8 wk
26 May
6 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
7 Apr – 5 May
8 Jun
4-8 wk
2 Jun
6 Jul
3 wk after
2 Jun
26 Jun
3 wk after
Foxglove
Digitalis purpurea
3 – 17 Mar
8-10 wk
12 May
0 wk
22 May
1 wk after
Busy lizzie
Impatiens walleriana
25 Mar – 22 Apr
1 Jul
8-12 wk
17 Jun
26 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
5 – 19 Apr
1 Jun
6-8 wk
31 May
13 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Fleece
6 – 20 May
4-6 wk
17 Jun
5 wk after
Chinese lantern
Physalis alkekengi
9 – 23 Mar
23 Apr
8-10 wk
18 May
18 Jun
1 wk after
Love in a mist
Nigella damascena
12 May
3 Jul
0 wk
5 May
23 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
5 – 19 Apr
12 May
6-8 wk
31 May
23 Jun
3 wk after
20 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
23 Feb – 23 Mar
23 Apr
8-12 wk
18 May
18 Jun
1 wk after
Cardoon
Cynara cardunculus
8 Mar – 5 Apr
24 Mar
8-12 wk
31 May
3 wk after
Regal-foxtail
Ptilotus nobilis
25 Mar – 22 Apr
22 Apr
8-12 wk
17 Jun
17 Jun
5 wk after
Globe amaranth
Gomphrena globosa
22 Apr – 6 May
6 May
6-8 wk
17 Jun
17 Jun
5 wk after
Corn poppy
Papaver rhoeas
12 May
18 Jul
0 wk
5 May
8 Jul
1 wk before
Snapdragon
Antirrhinum majus
17 Feb – 17 Mar
13 May
8-12 wk
12 May
8 Jul
0 wk
17 May
28 Jun
1 wk after
Flossflower
Ageratum houstonianum
8 – 22 Apr
18 May
8-10 wk
17 Jun
13 Jul
5 wk after
Sweet pea
Lathyrus odoratus
17 Mar – 7 Apr
3 Jun
5-8 wk
12 May
8 Jul
0 wk
Stock
Matthiola incana
17 – 31 Mar
6 Jun
6-8 wk
12 May
18 Jul
0 wk
22 May
8 Jul
1 wk after
Wormwood
Artemisia absinthium
17 – 31 Mar
7 May
6-8 wk
12 May
18 Jun
0 wk
22 May
8 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
6 – 20 May
15 May
4-6 wk
17 Jun
5 wk after
Garden pansy
Viola × wittrockiana
3 – 17 Mar
23 May
8-10 wk
12 May
18 Jul
0 wk
17 May
8 Jul
1 wk after
Petunia
Petunia
8 Mar – 5 Apr
8 May
8-12 wk
31 May
3 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
23 Mar – 6 Apr
7 May
6-8 wk
18 May
18 Jun
1 wk after
17 Jun
5 wk after
Common zinnia
Zinnia elegans
19 Apr – 3 May
13 Jun
4-6 wk
31 May
11 Jul
3 wk after
Common morning glory
Ipomoea purpurea
13 – 27 May
6 Jun
3-5 wk
17 Jun
27 Jun
5 wk after
Garden cosmos
Cosmos bipinnatus
19 Apr – 3 May
8 Jun
4-6 wk
31 May
6 Jul
3 wk after
17 Jun
26 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
6 Apr – 4 May
22 May
8-12 wk
29 Jun
17 Jul
7 wk after
Bee balm
Monarda didyma
17 Feb – 17 Mar
23 Apr
8-12 wk
12 May
18 Jun
0 wk
2 Jun
8 Jun
3 wk after
Yarrow
Achillea millefolium
17 – 31 Mar
7 Apr
6-8 wk
12 May
19 May
0 wk
22 May
1 wk after
Safflower
Carthamus tinctorius
12 May
18 Jun
0 wk
5 May
8 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
17 – 31 Mar
27 May
6-8 wk
12 May
8 Jul
0 wk
3 Apr
28 Jun
6 wk before
Bishop's flower
Ammi majus
31 Mar – 14 Apr
10 Jun
4-6 wk
12 May
8 Jul
0 wk
22 May
28 Jun
1 wk after
Drumsticks
Pycnosorus globosus
25 Mar – 8 Apr
2 Apr
10-12 wk
17 Jun
5 wk after
Sunflower
Helianthus annuus
3 – 10 May
17 Jun
3-4 wk
31 May
8 Jul
3 wk after
2 Jun
28 Jun
3 wk after
China aster
Callistephus chinensis
5 – 19 Apr
6 Jun
6-8 wk
31 May
18 Jul
3 wk after
17 Jun
8 Jul
5 wk after
Annual phlox
Phlox drummondii
28 Mar – 11 Apr
1 Jun
6-8 wk
23 May
13 Jul
2 wk after
17 Jun
3 Jul
5 wk after
Hollyhock
Alcea rosea
17 – 31 Mar
6-8 wk
12 May
0 wk
22 May
1 wk after
Alpine delphinium
Delphinium elatum
17 Feb – 17 Mar
23 Apr
8-12 wk
12 May
18 Jun
0 wk
2 Jun
8 Jun
3 wk after
African marigold
Tagetes erecta
5 – 19 Apr
1 Jun
6-8 wk
31 May
13 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
23 Mar – 6 Apr
27 May
6-8 wk
18 May
8 Jul
1 wk after
17 Jun
28 Jun
5 wk after
Wood sage
Salvia nemorosa
3 – 17 Mar
13 Apr
8-10 wk
12 May
8 Jun
0 wk
2 Jun
3 wk after
Black-eyed susan vine
Thunbergia alata
8 Apr – 6 May
16 May
6-10 wk
17 Jun
27 Jun
5 wk after
California goldenpoppy
Eschscholzia californica
12 May
18 Jul
0 wk
5 May
8 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
22 Mar – 5 Apr
8 May
8-10 wk
31 May
3 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
17 – 31 Mar
7 May
6-8 wk
12 May
18 Jun
0 wk
22 May
8 Jun
1 wk after