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Suur tähtputk ''Ruby Cloud'' Astrantia major hybr. Suur tähtputk ''Ruby Cloud'' Astrantia major hybr.

Tootja: Jelitto


Õied: toonid punasest roosani.
Õitsemine: juuni - august.
Talvekindluse tsoonid: Z 5-7.
Lehed: lõhestunud, pikkadel leherootsudel, koondunud juurelähedasse rosetti.
Kõrgus õitega: 75 cm.
Taimedevaheline kaugus: 60 cm.
Muld: igasugune aiamuld, hea niiskusega, mulla pH 5,8-6,5.
Paiknemine: täielikus päikesepaistes, võib ka poolvarjus.
Kaaslased: efektne koos Bergenia cordifolia "Winterglut", Milium effusum "Aureum" and
Salvia lyrata "Purple Knockout".
Kasutamine: suurepärased õied lõikeks.
1000 seemne kaal 3,33 grammi.
1000 taime saamiseks on vaja 10,0 grammi seemneid.
Külv: 3 seemne kaupa kasseti pessa.
Idanemine: külvid tehakse sooja ja niiskesse mulda (+18...22*C) esimesed 2-4 nädalat. Peale seda aega alandatakse külvide temperatuuri 4-6 nädalaks +4...-4*C-ni (Külvi stratifitseerimine).
Parim külviaeg külma kasvuhoonesse: märts, aprill ja mai.
Parim külviaeg: novembrist märtsini. Aeg külvist kuni tärkamiseni: 8-10 nädalat.
Family: Apiaceae, Umbelliferae.
 

Origin: Europe.
Special Features: Sturdy stems carry cream-colored, rounded umbels with harmonious purple-red flowering bracts.
Colour: Purple red Natural.
Flowering Period: June - August.
Winter Hardiness Zones: Z5-7.
Growth Habit: Clumping habit; 2-3 years to establish.
Foliage: Neatly divided basal foliage.
Height with Flower: 70 cm.
Spacing between Plants: 38 cm.
Soil Requirement: Well-drained, cool, moist soils, pH 5.8 - 6.8.
Location: Full sun to partial shade in warmer climates.
Use: Plant together with Aruncus aethusifolius, Rumex sanguineus var. sanguineus, Geranium macrorrhizum and Ophiopogon planiscapus "Nigrescens".
Specialities: An excellent border plant and cutflower in climates not too hot or too humid.
Cultural Tips: Grams per 1000 seeds: 3,03. Seeds per Gram: 330 Seeding.
Recommendation: 10g / 1000 plants.
Sowing Rate: 3 seeds per cell.
Plug tray recommended size(s): open flats.
Germination: The sowing must be kept warm (about +18 to 22°C) and moist for the first 2-4 weeks. After this period the sowing must be kept at a cold temperature (between -4 and +4°C) for another 4-6 weeks. It is not so important if the temperature is higher of lower during the cooling period, but the cooling period has to be prolonged because the synthesis of the germination inducer, homonlike acid, slows down or comes to a standstill. It is beneficial to cover the sowing with snow during the cooling period. After this cooling period the sowing may not be immediately exposed to high temperatures. The most effective temperatures are between +5 to 12°C, even if germination has started. The best location for this sowing, even in March, April and May, is open field, the cold frame or a cold greenhouse.
Scheduling:
Best Sowing Dates: November - March Sowing to Germination: 8 - 10 weeks.
Germination to Transplant: 6 - 8 weeks Transplanting to Salable Plant: 8 - 10 weeks.
Cutting-Back at Transplanting: Cut-back once to keep more compact.
Growing On: Container Size(s): 1-2 plugs per 11/12 cm; 2-3 plugs per 15 cm.
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 5°C. Exposure to cold may not be necessary for flowering but might improve quality.
Forcing: An obvious place to experiment - following vernalization - would be raising daytime temperatures to 15° - 17°C. 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. Fertilization: Medium (150-200 ppm).


Eng.: Great Masterwort. Suom.: Isotähtiputki. Sven.: Stjärnloka, Stjärnflocka.