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Temperature: Aconitum is a cool crop and performs poorly south of Zone 6. Plants require moist, cool conditions for adequate establishment, and summer temperatures in much of the country preclude high yields and quality. If plants are subjected to temperatures greater than 70F (21C) for any length of time, stems weaken, making support necessary (Lurie et al. 1992), and basal leaves quickly turn yellow. Performance is best in the Pacific Northwest and the Northeast. TJ219-4-2003 IMUS 7/TPB0019 Specialty Cut Flowers W6”XH9” 175L 120 White A W/F Magenta C 53 TJ219-4-2003 P001-588 175L T 15/5/03 5:48 PM Page 54 C B 54 M Y ACONITUM A cold period of 32–35F (0–2C) provided during winter (or for 10–12 weeks during the forcing period in a cooler) is necessary for flowering.

Louis, only the coastal areas of California, the Northwest, and the Northeast are producing significant numbers of monkshood. Monkshood is well established in several European markets but is only sporadically shipped to the United States. The most popular species for cut flowers is Aconitum napel- TJ219-4-2003 P001-588 175L T 15/5/03 5:48 PM Page 53 B M Y ACONITUM 53 lus (common monkshood). In all species, one of the sepals is enlarged, covering the floral parts like a hood, thus accounting for the common name.

This is known as the dry fraction. Dry fractions for all crops are best obtained by doing simple weighing experiments at the beginning and end of the drying cycle. This can be done by occasionally weighing individual bunches; to obtain the dry fraction, divide the dry weight of the plant by the fresh weight. 3). 6 kg). In general, drying times range from 3 days to 2 weeks in a passive system. In an active system, plant materials typically dry in 24 hours or less. Failure to adequately dry a plant can lead to serious mold problems if material is sleeved and boxed too early.

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