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Rel. frost
Last spring frost (0°C) 28 Apr Normal year · 20 years of data
Frost-free season 175 days 28 Apr – 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)
10 – 24 Mar
15 Jun
5-7 wk
28 Apr
20 Jul
0 wk
2 May
10 Jul
1 wk after
Broccoli
Brassica oleracea (Italica-gruppen)
17 – 31 Mar
27 Jun
4-6 wk
28 Apr
25 Jul
0 wk
2 May
15 Jul
1 wk after
Chili pepper
Capsicum annuum
Fleece
25 Feb – 25 Mar
16 Apr
8-12 wk
20 May
11 Jun
3 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
10 – 24 Mar
10 Jun
5-7 wk
28 Apr
15 Jul
0 wk
28 Apr
5 Jul
0 wk
Garden cucumber
Cucumis sativus
6 – 13 May
10 Jun
3-4 wk
3 Jun
1 Jul
5 wk after
Florence Fennel
Foeniculum vulgare
29 Apr – 6 May
7 Jun
4-5 wk
3 Jun
5 Jul
5 wk after
16 Jun
25 Jun
7 wk after
Butter bean
Phaseolus lunatus
Greenhouse
16 – 23 May
29 May
3-4 wk
13 Jun
19 Jun
7 wk after
Onion
Allium cepa (Cepa-gruppen)
3 Feb – 3 Mar
31 Mar
8-12 wk
28 Apr
26 May
0 wk
19 May
3 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
2 May
15 Jun
1 wk after
2 May
5 Jun
1 wk after
Maize
Zea mays
22 – 29 Apr
31 May
3-4 wk
20 May
21 Jun
3 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
7 – 14 Apr
4 Jul
3-4 wk
5 May
25 Jul
1 wk after
19 May
15 Jul
3 wk after
Carrot
Daucus carota subsp. sativus var. sativus
28 Apr
5 Jul
0 wk
28 Apr
25 Jun
0 wk
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
10 – 24 Mar
10 Jun
5-7 wk
28 Apr
15 Jul
0 wk
28 Apr
5 Jul
0 wk
Potato
Solanum tuberosum
2 – 16 Apr
1 Jun
4-6 wk
14 May
29 Jun
2 wk after
14 May
19 Jun
2 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
10 – 24 Mar
20 Jun
5-7 wk
28 Apr
25 Jul
0 wk
2 May
15 Jul
1 wk after
Pumpkin
Cucurbita pepo
6 – 13 May
26 Jun
3-4 wk
3 Jun
17 Jul
5 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
7 – 14 Apr
11 Jun
3-4 wk
5 May
2 Jul
1 wk after
19 May
22 Jun
3 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
17 – 31 Mar
22 Jun
4-6 wk
28 Apr
20 Jul
0 wk
Lettuce
Lactuca sativa
31 Mar – 7 Apr
9 Jul
3-4 wk
28 Apr
30 Jul
0 wk
2 May
20 Jul
1 wk after
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
17 – 31 Mar
22 Jun
4-6 wk
28 Apr
20 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
31 Mar – 14 Apr
1 Jun
2-4 wk
28 Apr
15 Jun
0 wk
28 Apr
5 Jun
0 wk
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
2 May
15 Jun
1 wk after
2 May
5 Jun
1 wk after
Spinach
Spinacia oleracea
31 Mar – 7 Apr
24 Jul
3-4 wk
28 Apr
14 Aug
0 wk
24 Apr
4 Aug
1 wk before
Sweet potato
Ipomoea batatas
30 May – 13 Jun
4-6 wk
11 Jul
11 wk after
Garden tomato
Solanum lycopersicum
25 Mar – 8 Apr
10 May
6-8 wk
20 May
21 Jun
3 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
22 Apr – 6 May
28 Jun
2-4 wk
20 May
12 Jul
3 wk after
16 Jun
2 Jul
7 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
17 – 31 Mar
22 Jun
4-6 wk
28 Apr
20 Jul
0 wk
Garden pea
Pisum sativum
31 Mar – 7 Apr
24 Jun
3-4 wk
28 Apr
15 Jul
0 wk
2 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
22 Apr – 6 May
4 Jun
4-6 wk
3 Jun
2 Jul
5 wk after
Lemon balm
Melissa officinalis
17 Feb – 3 Mar
20 May
8-10 wk
28 Apr
15 Jul
0 wk
2 Jun
5 Jul
5 wk after
Dill
Anethum graveolens
2 May
25 Jul
1 wk after
Wild chives
Allium schoenoprasum
3 – 17 Mar
3 Jun
6-8 wk
28 Apr
15 Jul
0 wk
2 May
5 Jul
1 wk after
Spearmint
Mentha spicata
3 Feb – 3 Mar
20 May
8-12 wk
28 Apr
15 Jul
0 wk
2 Jun
5 Jul
5 wk after
Coriander
Coriandrum sativum
28 Apr
14 Aug
0 wk
19 May
4 Aug
3 wk after
Garden sage
Salvia officinalis
24 Feb – 10 Mar
5 May
8-10 wk
5 May
30 Jun
1 wk after
Common thyme
Thymus vulgaris
17 Feb – 3 Mar
10 May
8-10 wk
28 Apr
5 Jul
0 wk
Oregano
Origanum vulgare
3 – 17 Mar
24 May
6-8 wk
28 Apr
5 Jul
0 wk
2 Jun
25 Jun
5 wk after
Parsley
Petroselinum crispum
3 – 17 Mar
24 May
6-8 wk
28 Apr
5 Jul
0 wk
2 May
25 Jun
1 wk after
Rosemary
Salvia rosmarinus
27 Jan – 24 Feb
6 Apr
10-14 wk
5 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
6 – 13 May
11 Jun
3-4 wk
3 Jun
2 Jul
5 wk after
Cornflower
Centaurea cyanus
28 Apr
15 Jul
0 wk
2 May
5 Jul
1 wk after
Statice
Limonium sinuatum
11 – 25 Mar
10 May
8-10 wk
20 May
5 Jul
3 wk after
Sweet William
Dianthus barbatus
3 – 17 Mar
6-8 wk
28 Apr
0 wk
14 May
2 wk after
Snow-on-the-mountain
Euphorbia marginata
25 Mar – 8 Apr
24 May
6-8 wk
20 May
5 Jul
3 wk after
11 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
18 Mar – 1 Apr
24 May
6-8 wk
13 May
5 Jul
2 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
7 Apr – 5 May
7 Jun
4-8 wk
2 Jun
5 Jul
5 wk after
2 Jun
25 Jun
5 wk after
Foxglove
Digitalis purpurea
17 Feb – 3 Mar
8-10 wk
28 Apr
0 wk
19 May
3 wk after
Busy lizzie
Impatiens walleriana
11 Mar – 8 Apr
29 Jun
8-12 wk
3 Jun
24 Aug
5 wk after
Creeping zinnia
Sanvitalia procumbens
25 Mar – 8 Apr
3 Jun
6-8 wk
20 May
15 Jul
3 wk after
Hyacinth bean
Dolichos lablab
Fleece
22 Apr – 6 May
5 May
4-6 wk
3 Jun
5 wk after
Chinese lantern
Physalis alkekengi
24 Feb – 10 Mar
20 Apr
8-10 wk
5 May
15 Jun
1 wk after
Love in a mist
Nigella damascena
28 Apr
30 Jun
0 wk
2 May
20 Jun
1 wk after
Strawflower
Xerochrysum bracteatum
25 Mar – 8 Apr
14 May
6-8 wk
20 May
25 Jun
3 wk after
11 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
10 Feb – 10 Mar
20 Apr
8-12 wk
5 May
15 Jun
1 wk after
Cardoon
Cynara cardunculus
25 Feb – 25 Mar
21 Mar
8-12 wk
20 May
3 wk after
Regal-foxtail
Ptilotus nobilis
11 Mar – 8 Apr
27 Apr
8-12 wk
3 Jun
22 Jun
5 wk after
Globe amaranth
Gomphrena globosa
8 – 22 Apr
11 May
6-8 wk
3 Jun
22 Jun
5 wk after
Corn poppy
Papaver rhoeas
28 Apr
15 Jul
0 wk
2 May
5 Jul
1 wk after
Snapdragon
Antirrhinum majus
3 Feb – 3 Mar
10 May
8-12 wk
28 Apr
5 Jul
0 wk
14 May
25 Jun
2 wk after
Flossflower
Ageratum houstonianum
25 Mar – 8 Apr
20 May
8-10 wk
3 Jun
15 Jul
5 wk after
Sweet pea
Lathyrus odoratus
3 – 24 Mar
31 May
5-8 wk
28 Apr
5 Jul
0 wk
Stock
Matthiola incana
3 – 17 Mar
3 Jun
6-8 wk
28 Apr
15 Jul
0 wk
19 May
5 Jul
3 wk after
Wormwood
Artemisia absinthium
3 – 17 Mar
4 May
6-8 wk
28 Apr
15 Jun
0 wk
19 May
5 Jun
3 wk after
Mexican sunflower
Tithonia rotundifolia
22 Apr – 6 May
20 May
4-6 wk
3 Jun
17 Jun
5 wk after
Garden pansy
Viola × wittrockiana
17 Feb – 3 Mar
20 May
8-10 wk
28 Apr
15 Jul
0 wk
14 May
5 Jul
2 wk after
Petunia
Petunia
25 Feb – 25 Mar
10 May
8-12 wk
20 May
5 Jul
3 wk after
Sweet Scabious
Scabiosa atropurpurea
10 – 24 Mar
4 May
6-8 wk
5 May
15 Jun
1 wk after
16 Jun
7 wk after
Common zinnia
Zinnia elegans
8 – 22 Apr
11 Jun
4-6 wk
20 May
9 Jul
3 wk after
Common morning glory
Ipomoea purpurea
29 Apr – 13 May
11 Jun
3-5 wk
3 Jun
2 Jul
5 wk after
Garden cosmos
Cosmos bipinnatus
8 – 22 Apr
7 Jun
4-6 wk
20 May
5 Jul
3 wk after
16 Jun
25 Jun
7 wk after
Scarlet milkweed
Asclepias curassavica
28 Mar – 25 Apr
27 May
8-12 wk
20 Jun
22 Jul
8 wk after
Bee balm
Monarda didyma
3 Feb – 3 Mar
20 Apr
8-12 wk
28 Apr
15 Jun
0 wk
2 Jun
5 Jun
5 wk after
Yarrow
Achillea millefolium
3 – 17 Mar
4 Apr
6-8 wk
28 Apr
16 May
0 wk
19 May
3 wk after
Safflower
Carthamus tinctorius
28 Apr
15 Jun
0 wk
2 May
5 Jun
1 wk after
Iceland poppy
Papaver nudicaule
Season too short
3 – 17 Mar
24 May
6-8 wk
28 Apr
5 Jul
0 wk
10 Apr
25 Jun
3 wk before
Bishop's flower
Ammi majus
17 – 31 Mar
7 Jun
4-6 wk
28 Apr
5 Jul
0 wk
19 May
25 Jun
3 wk after
Drumsticks
Pycnosorus globosus
11 – 25 Mar
31 Mar
10-12 wk
3 Jun
9 Jun
5 wk after
Sunflower
Helianthus annuus
22 – 29 Apr
14 Jun
3-4 wk
20 May
5 Jul
3 wk after
2 Jun
25 Jun
5 wk after
China aster
Callistephus chinensis
25 Mar – 8 Apr
3 Jun
6-8 wk
20 May
15 Jul
3 wk after
16 Jun
5 Jul
7 wk after
Annual phlox
Phlox drummondii
16 – 30 Mar
3 Jun
6-8 wk
11 May
15 Jul
2 wk after
16 Jun
5 Jul
7 wk after
Hollyhock
Alcea rosea
3 – 17 Mar
6-8 wk
28 Apr
0 wk
19 May
3 wk after
Alpine delphinium
Delphinium elatum
3 Feb – 3 Mar
20 Apr
8-12 wk
28 Apr
15 Jun
0 wk
2 Jun
5 Jun
5 wk after
African marigold
Tagetes erecta
25 Mar – 8 Apr
3 Jun
6-8 wk
20 May
15 Jul
3 wk after
Black-eyed Susan
Rudbeckia hirta
10 – 24 Mar
24 May
6-8 wk
5 May
5 Jul
1 wk after
16 Jun
25 Jun
7 wk after
Wood sage
Salvia nemorosa
17 Feb – 3 Mar
10 Apr
8-10 wk
28 Apr
5 Jun
0 wk
2 Jun
5 wk after
Black-eyed susan vine
Thunbergia alata
25 Mar – 22 Apr
21 May
6-10 wk
3 Jun
2 Jul
5 wk after
California goldenpoppy
Eschscholzia californica
28 Apr
15 Jul
0 wk
2 May
5 Jul
1 wk after
Painted tongue
Salpiglossis sinuata
11 – 25 Mar
10 May
8-10 wk
20 May
5 Jul
3 wk after
Water forget-me-not
Myosotis scorpioides
3 – 17 Mar
4 May
6-8 wk
28 Apr
15 Jun
0 wk
19 May
5 Jun
3 wk after