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Weigela, a garden shrub as a potted plant

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Organization
Abstract
The growing of Weigela sp. as a flowering pot plant has been studied. The research was done on three cultivars: Weigela japonica, Weigela florida 'Nana Purpurea' and hybrid Weigela 'Bristol Ruby'. Attention was given to the effect of pinching and of spraying growth inhibitors (maleic hydrazide, paclobutrazol and dikegulac-Na) on plant development. Two aspects were taken into consideration : the plant habit (elongation and branching) and flowering intensity. Pinching should stop at the end of May, later pinchings do increase branching but they lead to undesirable summer flowering. Maleic hydrazide (1,000 and 2,500 ppm) has no effect on elongation whereas it has a negative effect on flower initiation. An application of paclobutrazol at 40 ppm reduces the length of ramifications and has no effect on the number of flowers. For pot plants a rather early treatment (one month after the first pinching) should be recommended. Such a treatment inhibits the growth of the first internodes which results in more compact plants. Dikegulac-Na (at 800, 1,600 and 2,400 ppm) reduces the length of branches and suppresses apical dominance, which favours ramification; it has however a negative effect on the number of flowers. The reaction varied according to the dose and to the time of treatment. Carrying out a treatment at the end of May or early in June, using a low concentration (800 ppm) is a useful tool with respect to growing Weigela as a potted plant.
Keywords
BRANCHING, FLOWERING, PINCHING TREATMENT, GROWTH RETARDANTS

Citation

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Chicago
Van Labeke, Marie-Christine, L De Geyter, J Van Wezer, and M Bodson. 1991. “Weigela, a Garden Shrub as a Potted Plant.” Landbouwtijdschrift-revue De L Agriculture 44 (4): 675–683.
APA
Van Labeke, M.-C., De Geyter, L., Van Wezer, J., & Bodson, M. (1991). Weigela, a garden shrub as a potted plant. LANDBOUWTIJDSCHRIFT-REVUE DE L AGRICULTURE, 44(4), 675–683.
Vancouver
1.
Van Labeke M-C, De Geyter L, Van Wezer J, Bodson M. Weigela, a garden shrub as a potted plant. LANDBOUWTIJDSCHRIFT-REVUE DE L AGRICULTURE. 1991;44(4):675–83.
MLA
Van Labeke, Marie-Christine, L De Geyter, J Van Wezer, et al. “Weigela, a Garden Shrub as a Potted Plant.” LANDBOUWTIJDSCHRIFT-REVUE DE L AGRICULTURE 44.4 (1991): 675–683. Print.
@article{357555,
  abstract     = {The growing of Weigela sp. as a flowering pot plant has been studied. The research was done on three cultivars: Weigela japonica, Weigela florida 'Nana Purpurea' and hybrid Weigela 'Bristol Ruby'. 
Attention was given to the effect of pinching and of spraying growth inhibitors (maleic hydrazide, paclobutrazol and dikegulac-Na) on plant development. Two aspects were taken into consideration : the plant habit (elongation and branching) and flowering intensity. Pinching should stop at the end of May, later pinchings do increase branching but they lead to undesirable summer flowering. Maleic hydrazide (1,000 and 2,500 ppm) has no effect on elongation whereas it has a negative effect on flower initiation. 
An application of paclobutrazol at 40 ppm reduces the length of ramifications and has no effect on the number of flowers. For pot plants a rather early treatment (one month after the first pinching) should be recommended. Such a treatment inhibits the growth of the first internodes which results in more compact plants. 
Dikegulac-Na (at 800, 1,600 and 2,400 ppm) reduces the length of branches and suppresses apical dominance, which favours ramification; it has however a negative effect on the number of flowers. The reaction varied according to the dose and to the time of treatment. Carrying out a treatment at the end of May or early in June, using a low concentration (800 ppm) is a useful tool with respect to growing Weigela as a potted plant.},
  author       = {Van Labeke, Marie-Christine and De Geyter, L and Van Wezer, J and Bodson, M},
  issn         = {0776-2143},
  journal      = {LANDBOUWTIJDSCHRIFT-REVUE DE L AGRICULTURE},
  language     = {eng},
  number       = {4},
  pages        = {675--683},
  title        = {Weigela, a garden shrub as a potted plant},
  volume       = {44},
  year         = {1991},
}