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Rel. frost
Last spring frost (0°C) 8 May Normal year · 20 years of data
Frost-free season 150 days 8 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)
20 Mar – 3 Apr
15 Jun
5-7 wk
8 May
20 Jul
0 wk
12 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
27 Mar – 10 Apr
27 Jun
4-6 wk
8 May
25 Jul
0 wk
12 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Fleece
12 Mar – 9 Apr
13 Apr
8-12 wk
4 Jun
8 Jun
4 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
20 Mar – 3 Apr
10 Jun
5-7 wk
8 May
15 Jul
0 wk
8 May
5 Jul
0 wk
Garden cucumber
Cucumis sativus
23 – 30 May
7 Jun
3-4 wk
20 Jun
28 Jun
6 wk after
Florence Fennel
Foeniculum vulgare
16 – 23 May
2 Jun
4-5 wk
20 Jun
30 Jun
6 wk after
26 Jun
7 wk after
Butter bean
Phaseolus lunatus
Greenhouse
28 May – 4 Jun
3-4 wk
25 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
13 Feb – 13 Mar
31 Mar
8-12 wk
8 May
26 May
0 wk
29 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
12 May
15 Jun
1 wk after
12 May
5 Jun
1 wk after
Maize
Zea mays
7 – 14 May
28 May
3-4 wk
4 Jun
18 Jun
4 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
18 – 25 Apr
4 Jul
3-4 wk
16 May
25 Jul
1 wk after
29 May
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
8 May
5 Jul
0 wk
8 May
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
20 Mar – 3 Apr
10 Jun
5-7 wk
8 May
15 Jul
0 wk
8 May
5 Jul
0 wk
Potato
Solanum tuberosum
12 – 26 Apr
30 May
4-6 wk
24 May
27 Jun
2 wk after
24 May
17 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
20 Mar – 3 Apr
20 Jun
5-7 wk
8 May
25 Jul
0 wk
12 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
23 – 30 May
20 Jun
3-4 wk
20 Jun
11 Jul
6 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
18 – 25 Apr
11 Jun
3-4 wk
16 May
2 Jul
1 wk after
29 May
22 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
27 Mar – 10 Apr
22 Jun
4-6 wk
8 May
20 Jul
0 wk
Lettuce
Lactuca sativa
10 – 17 Apr
9 Jul
3-4 wk
8 May
30 Jul
0 wk
12 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
27 Mar – 10 Apr
22 Jun
4-6 wk
8 May
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
10 – 24 Apr
1 Jun
2-4 wk
8 May
15 Jun
0 wk
8 May
5 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
12 May
15 Jun
1 wk after
12 May
5 Jun
1 wk after
Spinach
Spinacia oleracea
10 – 17 Apr
24 Jul
3-4 wk
8 May
14 Aug
0 wk
4 May
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
9 – 23 Jun
4-6 wk
21 Jul
11 wk after
Garden tomato
Solanum lycopersicum
9 – 23 Apr
7 May
6-8 wk
4 Jun
18 Jun
4 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
7 – 21 May
22 Jun
2-4 wk
4 Jun
6 Jul
4 wk after
26 Jun
26 Jun
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
27 Mar – 10 Apr
22 Jun
4-6 wk
8 May
20 Jul
0 wk
Garden pea
Pisum sativum
10 – 17 Apr
24 Jun
3-4 wk
8 May
15 Jul
0 wk
12 May
5 Jul
1 wk after

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
9 – 23 May
29 May
4-6 wk
20 Jun
26 Jun
6 wk after
Lemon balm
Melissa officinalis
27 Feb – 13 Mar
20 May
8-10 wk
8 May
15 Jul
0 wk
12 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
12 May
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
13 – 27 Mar
3 Jun
6-8 wk
8 May
15 Jul
0 wk
12 May
5 Jul
1 wk after
Spearmint
Mentha spicata
13 Feb – 13 Mar
20 May
8-12 wk
8 May
15 Jul
0 wk
12 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
8 May
14 Aug
0 wk
29 May
4 Aug
3 wk after
Garden sage
Salvia officinalis
7 – 21 Mar
5 May
8-10 wk
16 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
27 Feb – 13 Mar
10 May
8-10 wk
8 May
5 Jul
0 wk
Oregano
Origanum vulgare
13 – 27 Mar
24 May
6-8 wk
8 May
5 Jul
0 wk
12 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
13 – 27 Mar
24 May
6-8 wk
8 May
5 Jul
0 wk
12 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
7 Feb – 7 Mar
6 Apr
10-14 wk
16 May
15 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
23 – 30 May
5 Jun
3-4 wk
20 Jun
26 Jun
6 wk after
Cornflower
Centaurea cyanus
8 May
15 Jul
0 wk
12 May
5 Jul
1 wk after
Statice
Limonium sinuatum
26 Mar – 9 Apr
3 May
8-10 wk
4 Jun
28 Jun
4 wk after
Sweet William
Dianthus barbatus
13 – 27 Mar
6-8 wk
8 May
0 wk
24 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
9 – 23 Apr
17 May
6-8 wk
4 Jun
28 Jun
4 wk after
21 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
1 – 15 Apr
22 May
6-8 wk
27 May
3 Jul
3 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
17 Apr – 15 May
5 Jun
4-8 wk
12 Jun
3 Jul
5 wk after
12 Jun
23 Jun
5 wk after
Foxglove
Digitalis purpurea
27 Feb – 13 Mar
8-10 wk
8 May
0 wk
29 May
3 wk after
Busy lizzie
Impatiens walleriana
28 Mar – 25 Apr
24 Jun
8-12 wk
20 Jun
19 Aug
6 wk after
Creeping zinnia
Sanvitalia procumbens
9 – 23 Apr
27 May
6-8 wk
4 Jun
8 Jul
4 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
23 Apr – 7 May
7 May
4-6 wk
4 Jun
4 Jun
4 wk after
Chinese lantern
Physalis alkekengi
7 – 21 Mar
20 Apr
8-10 wk
16 May
15 Jun
1 wk after
Love in a mist
Nigella damascena
8 May
30 Jun
0 wk
12 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
9 – 23 Apr
7 May
6-8 wk
4 Jun
18 Jun
4 wk after
21 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
21 Feb – 21 Mar
20 Apr
8-12 wk
16 May
15 Jun
1 wk after
Cardoon
Cynara cardunculus
12 Mar – 9 Apr
21 Mar
8-12 wk
4 Jun
4 wk after
Regal-foxtail
Ptilotus nobilis
28 Mar – 25 Apr
21 Apr
8-12 wk
20 Jun
6 wk after
Globe amaranth
Gomphrena globosa
25 Apr – 9 May
5 May
6-8 wk
20 Jun
6 wk after
Corn poppy
Papaver rhoeas
8 May
15 Jul
0 wk
12 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
13 Feb – 13 Mar
10 May
8-12 wk
8 May
5 Jul
0 wk
24 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
11 – 25 Apr
13 May
8-10 wk
20 Jun
8 Jul
6 wk after
Sweet pea
Lathyrus odoratus
13 Mar – 3 Apr
31 May
5-8 wk
8 May
5 Jul
0 wk
Stock
Matthiola incana
13 – 27 Mar
3 Jun
6-8 wk
8 May
15 Jul
0 wk
29 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
13 – 27 Mar
4 May
6-8 wk
8 May
15 Jun
0 wk
29 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
9 – 23 May
14 May
4-6 wk
20 Jun
6 wk after
Garden pansy
Viola × wittrockiana
27 Feb – 13 Mar
20 May
8-10 wk
8 May
15 Jul
0 wk
24 May
5 Jul
2 wk after
Petunia
Petunia
12 Mar – 9 Apr
3 May
8-12 wk
4 Jun
28 Jun
4 wk after
Sweet Scabious
Scabiosa atropurpurea
21 Mar – 4 Apr
4 May
6-8 wk
16 May
15 Jun
1 wk after
26 Jun
7 wk after
Common zinnia
Zinnia elegans
23 Apr – 7 May
6 Jun
4-6 wk
4 Jun
4 Jul
4 wk after
Common morning glory
Ipomoea purpurea
16 – 30 May
5 Jun
3-5 wk
20 Jun
26 Jun
6 wk after
Garden cosmos
Cosmos bipinnatus
23 Apr – 7 May
5 Jun
4-6 wk
4 Jun
3 Jul
4 wk after
26 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
7 Apr – 5 May
21 May
8-12 wk
30 Jun
16 Jul
8 wk after
Bee balm
Monarda didyma
13 Feb – 13 Mar
20 Apr
8-12 wk
8 May
15 Jun
0 wk
12 Jun
5 wk after
Yarrow
Achillea millefolium
13 – 27 Mar
4 Apr
6-8 wk
8 May
16 May
0 wk
29 May
3 wk after
Safflower
Carthamus tinctorius
8 May
15 Jun
0 wk
12 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
13 – 27 Mar
24 May
6-8 wk
8 May
5 Jul
0 wk
20 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
27 Mar – 10 Apr
7 Jun
4-6 wk
8 May
5 Jul
0 wk
29 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
28 Mar – 11 Apr
10-12 wk
20 Jun
6 wk after
Sunflower
Helianthus annuus
7 – 14 May
14 Jun
3-4 wk
4 Jun
5 Jul
4 wk after
12 Jun
25 Jun
5 wk after
China aster
Callistephus chinensis
9 – 23 Apr
3 Jun
6-8 wk
4 Jun
15 Jul
4 wk after
26 Jun
5 Jul
7 wk after
Annual phlox
Phlox drummondii
28 Mar – 11 Apr
27 May
6-8 wk
23 May
8 Jul
2 wk after
26 Jun
28 Jun
7 wk after
Hollyhock
Alcea rosea
13 – 27 Mar
6-8 wk
8 May
0 wk
29 May
3 wk after
Alpine delphinium
Delphinium elatum
13 Feb – 13 Mar
20 Apr
8-12 wk
8 May
15 Jun
0 wk
12 Jun
5 wk after
African marigold
Tagetes erecta
9 – 23 Apr
27 May
6-8 wk
4 Jun
8 Jul
4 wk after
Black-eyed Susan
Rudbeckia hirta
21 Mar – 4 Apr
24 May
6-8 wk
16 May
5 Jul
1 wk after
26 Jun
7 wk after
Wood sage
Salvia nemorosa
27 Feb – 13 Mar
10 Apr
8-10 wk
8 May
5 Jun
0 wk
12 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
11 Apr – 9 May
15 May
6-10 wk
20 Jun
26 Jun
6 wk after
California goldenpoppy
Eschscholzia californica
8 May
15 Jul
0 wk
12 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
26 Mar – 9 Apr
5 May
8-10 wk
4 Jun
30 Jun
4 wk after
Water forget-me-not
Myosotis scorpioides
13 – 27 Mar
4 May
6-8 wk
8 May
15 Jun
0 wk
29 May
5 Jun
3 wk after