Ecks from Tex said:
Thanks @Ecks from Tex . Do you know of a PGR equivalent?
For shrubs and ornamentals? I have been using Cutless .33G Landscape Growth Regulator but have been considering trying Atrimmec PGR because it's a foliar application which I prefer. Cutless seems to do very well on shrub regulation and will really cut down on your maintenance, but it's absorbed into the roots and I always have a hard time figuring out the application rate. Plus, I've been expiranmentint with PGR on roses because I really find that avoiding doing major pruning in June makes the plant healthier all summer. But in Feb they are trimmed basically to the hardwood. So with a foliage PGR I feel a little more in control of when growth regulation begins and how long it must last.
This is a work in progress and I'm still sort of in the research phase on Atrimmec.
Cutless acts by getting involved with Gibberelic Acid, much like how Trinexepac does in grass. Atrimmec controls growth by killing buds and stopping apical dominance. Hedges treated with Atrimmec act by first showing yellowed and killed shoots, then acting as if they were trimmed. Atrimmec affects plants as if they were constantly cut and trimmed. Cutless reduces length of shoots, but does not kill them. I would not apply Atrimmec to roses.
Definitely not applying attrimmec to roses, seeing as from what I've read it is likely to discourage blooms entirely.
I've got about 5-6 different shrubs im interested in regulating. Been researching it heavily. I have a lot of asian jasmine groundcover, where the root systems are scattered and not easily located. For that, I need something with a foliar application, which is why I've been researching attrimmec.
All in all, I definitely prefer the Cutless (or PGRs with similar modes of action) because it is from the mode of PGR that is a gibberelic inhibitor/blocker. That mode of action may block shoots and upward growth, but it also encourages thicker growth, drought resistance, and disease resistance. I have two problems, though. First being that I need a PGR that can perform with foliar application, and cutless is only granular. I researched other SePro alternatives like topfloor, etc., but their labels just did not seem to match my application needs. My second problem is that I do not think Cutless will work well on my roses, but could be 100% wrong on that one.
The farther down the rabbit hole I go, I start running into greenhouse PGRs like B-Nine and A-Rest, which seem interesting for flower pots and possibly even my roses.
Not sure, I honestly started just writing a summary of it so I could get it all straight. Probably will post it on here so other's can benefit from it as well once I'm done.