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Optimum temperature and duration of low-temperature treatment for forcing tulips


, : Optimum temperature and duration of low-temperature treatment for forcing tulips. Acta Horticulturae (47): 201-208

The optimum cooling temperature needed for early-forced tulip bulbs differs between countries. In trials both Dutch and Japanese bulbs of the cvs Paul Richter and William Pitt were given either the standard Japanese treatment of 15 deg C for 2 weeks + 2 deg for 7-8 weeks or the Dutch "five-degree" treatment of 17 deg for 2 weeks + 5 deg for 9 weeks.

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Related references

Inaba, K.; Asano, A., 1974: Studies on forcing tulips, cv. William Pitt. The optimum night temperature for Christmas flowering. Plants were subjected to various night temperature treatments from sprouting to anthesis with the day temperature held at 25 deg C. For early flowering, temperatures of 20 or 22 deg were more effective than lower ones at most stages after sproutin...

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Suh, J.K.; Chung, H.D.; Byun, J.K.; Roh, S.M., 1982: Studies on tulip (Tulipa gesneriana L.) forcing. I. Influence of bulb source and temperature treatment on growth and flowering of tulips. Newly imported tulip bulbs grown for one year and others grown for 10 years in S. Korea were prepared for forcing with cold treatment at 5 or 9 deg C. No forced Red Matador bulbs from either source or any cold treatment produced flowers. Both type...

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