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Rel. frost
Last spring frost (0°C) 9 May Normal year · 20 years of data
Frost-free season 149 days 9 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)
19 Apr – 3 May
17 Jun
5-7 wk
7 Jun
22 Jul
4 wk after
2 May
12 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
11 – 25 Apr
29 Jun
4-6 wk
23 May
27 Jul
2 wk after
2 May
17 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
2 – 30 Apr
13 Apr
8-12 wk
25 Jun
7 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
24 Feb – 10 Mar
12 Jun
5-7 wk
14 Apr
17 Jul
4 wk before
27 Apr
7 Jul
2 wk before
Garden cucumber
Cucumis sativus
5 – 12 Jun
7 Jun
3-4 wk
3 Jul
8 wk after
Florence Fennel
Foeniculum vulgare
29 May – 5 Jun
5 Jun
4-5 wk
3 Jul
3 Jul
8 wk after
14 Jun
23 Jun
5 wk after
Butter bean
Phaseolus lunatus
Greenhouse
7 – 14 Jun
3-4 wk
5 Jul
8 wk after
Onion
Allium cepa (Cepa-gruppen)
14 Feb – 14 Mar
2 Apr
8-12 wk
9 May
28 May
Vid frost
19 May
1 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
2 May
17 Jun
1 wk before
2 May
7 Jun
1 wk before
Maize
Zea mays
28 May – 4 Jun
28 May
3-4 wk
25 Jun
7 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
10 – 17 May
6 Jul
3-4 wk
7 Jun
27 Jul
4 wk after
19 May
17 Jul
1 wk after
Carrot
Daucus carota subsp. sativus var. sativus
27 Apr
27 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
24 Feb – 10 Mar
12 Jun
5-7 wk
14 Apr
17 Jul
4 wk before
27 Apr
7 Jul
2 wk before
Potato
Solanum tuberosum
2 – 16 Apr
5 Jun
4-6 wk
14 May
3 Jul
1 wk after
14 May
23 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
24 Feb – 10 Mar
22 Jun
5-7 wk
14 Apr
27 Jul
4 wk before
2 May
17 Jul
1 wk before
Pumpkin
Cucurbita pepo
5 – 12 Jun
26 Jun
3-4 wk
3 Jul
17 Jul
8 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
10 – 17 May
17 Jun
3-4 wk
7 Jun
8 Jul
4 wk after
19 May
28 Jun
1 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
11 – 25 Apr
24 Jun
4-6 wk
23 May
22 Jul
2 wk after
Lettuce
Lactuca sativa
4 – 11 Apr
11 Jul
3-4 wk
2 May
1 Aug
1 wk before
2 May
22 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
21 Mar – 4 Apr
24 Jun
4-6 wk
2 May
22 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
30 Mar – 13 Apr
3 Jun
2-4 wk
27 Apr
17 Jun
2 wk before
27 Apr
7 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
2 May
17 Jun
1 wk before
2 May
7 Jun
1 wk before
Spinach
Spinacia oleracea
27 Mar – 3 Apr
26 Jul
3-4 wk
24 Apr
16 Aug
2 wk before
21 Apr
6 Aug
3 wk before
Sweet potato
Ipomoea batatas
5 – 19 Jun
4-6 wk
17 Jul
10 wk after
Garden tomato
Solanum lycopersicum
30 Apr – 14 May
7 May
6-8 wk
25 Jun
7 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
28 May – 11 Jun
28 Jun
2-4 wk
25 Jun
12 Jul
7 wk after
14 Jun
2 Jul
5 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
11 – 25 Apr
24 Jun
4-6 wk
23 May
22 Jul
2 wk after
Garden pea
Pisum sativum
27 Mar – 3 Apr
26 Jun
3-4 wk
24 Apr
17 Jul
2 wk before
2 May
7 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
22 May – 5 Jun
4 Jun
4-6 wk
3 Jul
8 wk after
Lemon balm
Melissa officinalis
28 Feb – 14 Mar
22 May
8-10 wk
9 May
17 Jul
Vid frost
30 May
7 Jul
3 wk after
Dill
Anethum graveolens
2 May
27 Jul
1 wk before
Wild chives
Allium schoenoprasum
17 Feb – 3 Mar
5 Jun
6-8 wk
14 Apr
17 Jul
4 wk before
2 May
7 Jul
1 wk before
Spearmint
Mentha spicata
30 Jan – 27 Feb
22 May
8-12 wk
24 Apr
17 Jul
2 wk before
30 May
7 Jul
3 wk after
Coriander
Coriandrum sativum
19 May
6 Aug
1 wk after
Garden sage
Salvia officinalis
29 Mar – 12 Apr
7 May
8-10 wk
7 Jun
2 Jul
4 wk after
Common thyme
Thymus vulgaris
14 – 28 Mar
12 May
8-10 wk
23 May
7 Jul
2 wk after
Oregano
Origanum vulgare
20 Mar – 3 Apr
26 May
6-8 wk
15 May
7 Jul
1 wk after
30 May
27 Jun
3 wk after
Parsley
Petroselinum crispum
27 Feb – 13 Mar
26 May
6-8 wk
24 Apr
7 Jul
2 wk before
2 May
27 Jun
1 wk before
Rosemary
Salvia rosmarinus
1 – 29 Mar
8 Apr
10-14 wk
7 Jun
17 Jun
4 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
5 – 12 Jun
11 Jun
3-4 wk
3 Jul
8 wk after
Cornflower
Centaurea cyanus
24 Apr
17 Jul
2 wk before
2 May
7 Jul
1 wk before
Statice
Limonium sinuatum
16 – 30 Apr
6 May
8-10 wk
25 Jun
1 Jul
7 wk after
Sweet William
Dianthus barbatus
27 Feb – 13 Mar
6-8 wk
24 Apr
2 wk before
14 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
30 Apr – 14 May
20 May
6-8 wk
25 Jun
1 Jul
7 wk after
17 Jul
10 wk after
Pinnate dahlia
Dahlia × pinnata
24 Apr – 8 May
26 May
6-8 wk
19 Jun
7 Jul
6 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
4 Apr – 2 May
9 Jun
4-8 wk
30 May
7 Jul
3 wk after
30 May
27 Jun
3 wk after
Foxglove
Digitalis purpurea
13 – 27 Feb
8-10 wk
24 Apr
2 wk before
19 May
1 wk after
Busy lizzie
Impatiens walleriana
10 Apr – 8 May
28 Jun
8-12 wk
3 Jul
23 Aug
8 wk after
Creeping zinnia
Sanvitalia procumbens
30 Apr – 14 May
30 May
6-8 wk
25 Jun
11 Jul
7 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
14 – 28 May
4-6 wk
25 Jun
7 wk after
Chinese lantern
Physalis alkekengi
29 Mar – 12 Apr
22 Apr
8-10 wk
7 Jun
17 Jun
4 wk after
Love in a mist
Nigella damascena
2 May
22 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
30 Apr – 14 May
10 May
6-8 wk
25 Jun
7 wk after
17 Jul
10 wk after
Purple-top vervain
Verbena bonariensis
15 Mar – 12 Apr
22 Apr
8-12 wk
7 Jun
17 Jun
4 wk after
Cardoon
Cynara cardunculus
Fleece
21 Mar – 18 Apr
23 Mar
8-12 wk
13 Jun
5 wk after
Regal-foxtail
Ptilotus nobilis
10 Apr – 8 May
27 Apr
8-12 wk
3 Jul
8 wk after
Globe amaranth
Gomphrena globosa
8 – 22 May
11 May
6-8 wk
3 Jul
8 wk after
Corn poppy
Papaver rhoeas
2 May
7 Jul
1 wk before
Snapdragon
Antirrhinum majus
7 Feb – 7 Mar
12 May
8-12 wk
2 May
7 Jul
1 wk before
14 May
27 Jun
1 wk after
Flossflower
Ageratum houstonianum
24 Apr – 8 May
16 May
8-10 wk
3 Jul
11 Jul
8 wk after
Sweet pea
Lathyrus odoratus
27 Feb – 20 Mar
2 Jun
5-8 wk
24 Apr
7 Jul
2 wk before
Stock
Matthiola incana
7 – 21 Mar
5 Jun
6-8 wk
2 May
17 Jul
1 wk before
19 May
7 Jul
1 wk after
Wormwood
Artemisia absinthium
27 Feb – 13 Mar
6 May
6-8 wk
24 Apr
17 Jun
2 wk before
19 May
7 Jun
1 wk after
Mexican sunflower
Tithonia rotundifolia
22 May – 5 Jun
4-6 wk
3 Jul
8 wk after
Garden pansy
Viola × wittrockiana
3 – 17 Feb
22 May
8-10 wk
14 Apr
17 Jul
4 wk before
14 May
7 Jul
1 wk after
Petunia
Petunia
2 – 30 Apr
6 May
8-12 wk
25 Jun
1 Jul
7 wk after
Sweet Scabious
Scabiosa atropurpurea
12 – 26 Apr
6 May
6-8 wk
7 Jun
17 Jun
4 wk after
14 Jun
5 wk after
Common zinnia
Zinnia elegans
14 – 28 May
10 Jun
4-6 wk
25 Jun
8 Jul
7 wk after
Common morning glory
Ipomoea purpurea
29 May – 12 Jun
11 Jun
3-5 wk
3 Jul
8 wk after
Garden cosmos
Cosmos bipinnatus
14 – 28 May
9 Jun
4-6 wk
25 Jun
7 Jul
7 wk after
14 Jun
27 Jun
5 wk after
Scarlet milkweed
Asclepias curassavica
14 Apr – 12 May
27 May
8-12 wk
7 Jul
22 Jul
8 wk after
Bee balm
Monarda didyma
14 Feb – 14 Mar
22 Apr
8-12 wk
9 May
17 Jun
Vid frost
30 May
7 Jun
3 wk after
Yarrow
Achillea millefolium
27 Feb – 13 Mar
6 Apr
6-8 wk
24 Apr
18 May
2 wk before
19 May
1 wk after
Safflower
Carthamus tinctorius
24 Apr
17 Jun
2 wk before
2 May
7 Jun
1 wk before
Iceland poppy
Papaver nudicaule
17 Feb – 3 Mar
26 May
6-8 wk
14 Apr
7 Jul
4 wk before
27 Apr
27 Jun
2 wk before
Bishop's flower
Ammi majus
7 – 21 Apr
9 Jun
4-6 wk
19 May
7 Jul
1 wk after
19 May
27 Jun
1 wk after
Drumsticks
Pycnosorus globosus
Fleece
2 – 16 Apr
8 Apr
10-12 wk
25 Jun
7 wk after
Sunflower
Helianthus annuus
28 May – 4 Jun
16 Jun
3-4 wk
25 Jun
7 Jul
7 wk after
30 May
27 Jun
3 wk after
China aster
Callistephus chinensis
30 Apr – 14 May
5 Jun
6-8 wk
25 Jun
17 Jul
7 wk after
14 Jun
7 Jul
5 wk after
Annual phlox
Phlox drummondii
18 Apr – 2 May
30 May
6-8 wk
13 Jun
11 Jul
5 wk after
14 Jun
1 Jul
5 wk after
Hollyhock
Alcea rosea
27 Feb – 13 Mar
6-8 wk
24 Apr
2 wk before
19 May
1 wk after
Alpine delphinium
Delphinium elatum
28 Feb – 28 Mar
22 Apr
8-12 wk
23 May
17 Jun
2 wk after
30 May
7 Jun
3 wk after
African marigold
Tagetes erecta
30 Apr – 14 May
30 May
6-8 wk
25 Jun
11 Jul
7 wk after
Black-eyed Susan
Rudbeckia hirta
12 – 26 Apr
26 May
6-8 wk
7 Jun
7 Jul
4 wk after
14 Jun
27 Jun
5 wk after
Wood sage
Salvia nemorosa
6 – 20 Mar
12 Apr
8-10 wk
15 May
7 Jun
1 wk after
30 May
3 wk after
Black-eyed susan vine
Thunbergia alata
24 Apr – 22 May
21 May
6-10 wk
3 Jul
8 wk after
California goldenpoppy
Eschscholzia californica
2 May
7 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
16 – 30 Apr
8 May
8-10 wk
25 Jun
3 Jul
7 wk after
Water forget-me-not
Myosotis scorpioides
27 Feb – 13 Mar
6 May
6-8 wk
24 Apr
17 Jun
2 wk before
19 May
7 Jun
1 wk after