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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 141 days 12 May – 30 Sep

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