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Douglas Bailey, Professor, and Brian Whipker, Extension Horticulture Specialist - page 11 / 16

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Table 1, continued.

Crop

Flowering/Foliage Plants, Woody Species,

Purpose To control plant height

Product Bonzi

Application Method & Rate 50 ppm spray (1.6 fl oz/gal)

Precautions & Remarks

Users should conduct trials on a small number of plants, adjusting the rate as needed for desired final plant height and length of height control.

continued

0.237 mg a.i. drench for a 6 inch pot (0.064 fl oz/gal of drench solution; apply 4 fl oz/6 inch pot)

Drench volumes and mg a.i. vary with pot size. Contact floricultural specialists at NC State University.

800 to 4,000 ppm spray (0.87 to 4.34 fl oz/gal)

Optimum rate depends on species, desired amount of height control, and environmental conditions. The suggested initial rate for small-scale trials is 1,250 ppm. Example woody species known to respond to cycocel are Baleria cristata, Bougainvillea, Camellia, Gardenia, Fuchsia, Hollies, Hydrangea, Lantana, Pseuderanthemum lactifolia, Rhododendron, and Roses (potted).

2,000 to 4,000 ppm drench

Drench volumes vary with pot size. See label for recommended volumes. Woody species known to respond to cycocel are listed above.

20 to 50 ppm spray (5.1 to 12.7 fl oz/gal)

Users should conduct trials on a small number of plants, adjusting the rate as needed for desired final plant height and length of height control.

0.5 to 2 ppm drench (0.13 to 0.52 fl oz/gal)

Drench volumes and mg a.i. vary with pot size. Contact floricultural specialists at NC State University.

100 to 300 ppm corm soak (3.2 to 9.6 fl oz/gal)

Soak corms in the solution for 1 hour before planting.

500 ppm spray (1.619 fl oz/gal)

Florel applications will provide some growth retardant effects. A delay in flowering will also occur with the use of Florel. Read the label for restrictions on timing of applications.

50 ppm spray (24.2 fl oz/gal)

0.25 mg a.i. drench for a 6 inch pot (1 fl oz/gal of drench solution; apply 4 fl oz/6 inch pot)

Drench volumes and mg a.i. vary with pot size. Contact floricultural specialists at NC State University.

5,000 ppm spray (0.79 oz/gal)

26 to 66 ppm spray (12.6 to 32 fl oz/gal)

See Ageratum.

5 to 20 ppm spray (0.16 to 0.64 fl oz/gal)

Apply to zonal geraniums when new growth is 1.5 to 2 inches long. Apply to seed geraniums approximately 2 to 4 weeks after transplanting.

800 to 1,500 ppm spray (0.87 to 1.63 fl oz/gal)

First application should be made 2 to 4 weeks after planting plugs or rooted cuttings (after stems have started elongating). Multiple applications may be needed.

Cycocel

Sumagic

To control plant height

Bonzi

To increase lateral branching

Florel

To control plant height

A-Rest

Geranium

Freesia

Fuchsia

Gardenia

Cycocel

Bonzi

To control plant height

B-Nine A-Rest

3 to 6 ppm spray (0.77 to 1.54 fl oz/gal) for cutting geraniums and 2 to 4 ppm spray (0.51 to 1.02 fl oz/gal) for seed geraniums

See Ageratum.

1,500 ppm spray (1.63 fl oz/gal)

Make two applications at 35 and 42 days after seeding. Treated plants should flower earlier, be more compact, and more well-branched than untreated plants.

Sumagic

To promote earlier flowering in seed geraniums

Cycocel

Gerbera Daisy

To increase lateral branching

Florel

To control plant height

A-Rest

300 to 500 ppm spray (1.619 to 3.24 fl oz/gal)

25 to 132 ppm spray (12.1 to 64 fl oz/gal)

Labeled for zonal and ivy geraniums. Use the lower concentration for ivy geraniums. Florel will also provide some growth retardant effect. A delay in flowering will also occur with the use of Florel. Read the label for restrictions on timing of applications.

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