Butterfly bush ( Buddleia spp . ) are swell perennial flowering plants to meet the current involvement in pollinator gardens . These very vigorous plant are typically grown as herbaceous perennial although they become quite woody in the landscape . We ’ve conducted several PGR trial with unlike cultivar using uniconazole ( Concise , Sumagic ) and/or paclobutrazol ( Piccolo , Piccolo 10XC , Bonzi , Pac O ) and this is a good place to summarize some of those results .
by Joyce Latimer
As with most of our herbaceous perennials , Buddleia cultivars vary in their response to PGRs ( Table 1 ) . As a very vigorous crop Buddleia requires early PGR applications . In our studies , the PGRs were applied as liner soaks prior to potting ( ‘ Honeycomb ’ ) or as foliar spray or substratum drenches ( 10 fl . oz . per trade gallon skunk ) apply 10 to 14 days after pot . As you may see with the cultivars list below , the growth reaction was maximise at 3 or 4 weeks after the PGR software program ( WAT ) . Much of this growth control , proportional to the untreated ascendancy , was lost by 6 WAT .
Table 1 . Maximum growth control(percent shorter than untreated control works ) of Buddleia species / cultivars using uniconazole ( uni , Concise ) or paclobutrazol ( paclo , Piccolo ) apply as foliar sprays , liner inebriate ( 2 min ) or drench ( 10 Sunshine State . oz . per trade congius pot)as appraise at 3 or 4 ( calculate on experimentation ) and 6 week after treatment software ( WAT ) .
The rapid recommencement of growth suggest a potential benefit to plan to make multiple applications during output . The increase in the distance of the internode as the PGR effect is lost , is a visible index number of the indigence to make a 2d software ( see photograph 1 ) . This change in elongation is exonerated in the Buddleia ‘ Lochinch ’ plant treat with 0.5 ppm substratum drench ( secondly from left , Photo1 ) . Also notice the significant maturation control with the 60 ppm foliar spray ofu niconazole at 4 WAT which persisted through a 6 WAT measurement .
In summary , Buddleia is generally responsive to either uniconazole or paclobutrazol . However , the response change with cultivar . Therefore , you will need to run your own trials or start with low-spirited software rates and make extra covering as necessary . Once you narrow down the rate , consider planning on making a second applications programme later in the crop cycle to reach season foresightful restraint .
Source : eGRO Blog
