LOBELIA siphilitica

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LOBELIA siphilitica

Blue Cardinal Flower, Great Blue Lobelia
Select Item No. LA378

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Available

One Portion is usually sufficient for approx. 50 plants.
Please switch to gram for larger quantities.



Plant Description

Life Cycle: Perennial
Family: Campanulaceae
Origin: Eastern North America
Special Features: Erect flowering racemes with blue blooms.
Historical: Genus named in honor of Flemish botanist and physician, Mathias de l'Obel. Species used once for the treatment of syphilis.
 
Basic Colour: (blue)
Flower Colour: bright blue
Natural Flowering Period: July - September
Flowering: First year flowering
 
Winter Hardiness Zones: Z3 - Z9
Foliage: lanceolate, slightly toothed
Growth Habit: upright, erect
Height with Flowers: 60 cm
Spacing between Plants: 45 cm
Soil Requirements: moist / average
Location:
Characteristics: medicinal plant
Usage: suitable for cutting / water or marshplant
Grams per 1000 seeds: 0.04348 Gram
Seeds per Gram
(does not correspond to the number of plants!):
23000
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
0.5 Gram
Sowing Rates/Trays: 7 - 8 per cell
Plug tray recommended size(s): 128 / 288
Sowing Direction:

(4) These are very tiny seeds which should be mixed with finest sand or talcum for an even sowing. Do not cover with compost, only press them in gently. Irrigate from the bottom or with a hand-sprayer, so that the seeds will not be washed away.

(9) These seeds germinate rapidly depending on species and origin. If germination does not occur after 3–4 weeks a cooling period of 2–4 weeks is recommended.

Best Sowing Date
(northern Hemisphere, Field condition):
late autumn - early spring
Sowing to Germination: 6 - 8 weeks
Germination to Transplant: 4 - 6 weeks
Transplanting to Potting: 6 - 8 weeks
Cutting back at Transplanting: Not Necessary.
Container Size(s): 1 plug per 8/9 cm (3 1/2") / 1-2 plugs per 11/12 cm (4 1/2")
Vernalization: There is no current research on vernalization but a prudent recommendation for any perennial would be 6-12 weeks (a few might need 15 weeks!) at an average daily temperature of 40°F (5°C). Exposure to cold may not be necessary for flowering but might improve quality.
Forcing: Provide 16 hours of continuous lighting. During the short days of winter, provide a night interruption lighting of 4 hours between 10:00 p.m. and 2:00 a.m. 6-8 weeks to flower.
Fertilizer: Medium (150-200 ppm)
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