what zone are you might help?

You can keep them actively growing and blooming by providing at least 14 - 16 hours of very bright light a day. Usually a 1,000 watt grow light set on a timer can accomplish this.

Not sure so do not want to assume but...they are inside right?

I think Dave covered it in his post. I do not believe there is much impact if a younger plant does not go dormant. In some cases its been my experience keeping them going is better.

I agree with Dave.. You can keep a tree in an active growing environment but the inflo might not develop as fast as it would if growing in the natural growing season. It also will limit the true coloration of the bloom because of the lack of heat, humidity Etc. Some of my trees that I brought inside for the winter have late inflos and I placed them under lights, but I know they won't be as lovely as they would during my regular growing season.

It's still worth trying though because they can surprise you! One of my trees ( California Sally ) had an inflo slowly growing last winter under lights and the inflo continued to develop and grow with it blooming all summer long!

It would figure that it's one of Bud G. Named varieties, because he wouldn't have it any other way... Lol! ( he would expect this one to bloom heavily with huge blooms.. That's the Guillot way!!). Lolololol....

Good luck with your trees.. Most of mine will go dormant with a few exceptions!!

Here is a picture of the California Sally that kept her inflo and continued to be more colorful during the summer...

Laura

Please don't let them see freezing temperatures.. I assume that yours is inside as well....

To answer the question about my location, I am in northeast NJ and in zone 7A. Right now, my three plumerias are outside, mostly during the daytime and brought in when the temperature dips below freezing. Is it possible to keep them growing without growth lights? The second smallest, has just grown overnight, it went from the size of my index finger to a little bigger. Is that normal? Also, how long does it take from info to blooms especially at this of the year?

Deelan.. I would be very careful with the nighttime lows in your area..

I live in Virginia and my trees won't see temps below 45 degrees and especially if they are young trees that are more sensitive and not established. Be careful of black tip with exposing to low temps.

If you are not using lights and heat then they will probably all go into a dormancy period. Inflos could take months this time of the year and could stall. These trees ( different varieties ) are all different so it's hard to really say ( time wise how long it could take) again, it could keep the inflo all winter and then start growing when the daylight are longer and the temps start warming. It could also naturally abort. It all just depends on what the tree will do during the winter months.

Sounds like you want to just keep them close to the natural light as possible without using extra lengths to keep them active, so I would be very careful now with the lows temps and keep them as warm as possible..

Most of my trees will sit in a back room and naturally rest until March and then once the nighttime temps are around 50 degrees ( usually around late April) they will go back outside.

Laura

Sorry I meant straight up or outwards.

Elongated growth, or etiolated growth = the plant stretches a bit due to lower light. This makes for a weaker and often very tall plant. Weaker growth will not bloom as readily.