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