Hi Myermike
Welcome to the board. You have some great questions, I cannot help you, would like to hear some of the answers too. Some of our experts will come in and help you.
Karen B.

As you can see, I live in Fla. I leave my plumeria out most of the year. We do get rain once in awhile during the winter and it hasn't affected my plumeria. If I had to bring in for the winter I would give them a little water once a month. Say about a cup.
Don't know if this will help you.

Lot of questions. I'll tell you what I do. Whether it's the best advice or not, I don't know, but it works for me!

Ok...I have a question on not watering plumeria in the winter. If you let the roots completely dry out on most plants,,,,Then try to water them, it is a known fact that plants can not obsorb water through the root system once overly dried out and kill the plant from root rot. Will this same thing happen to plumeria plants if you just stick them away through dormacy till the spring and not water because the roots will be completely dried out!? Makes sense to me. I usually water the root ball just enough to keep it barely moist throughout the winter. I never intentionally let the root ball dry out completely -- but others do. If you do, I would think you'd not want to water it much at all until spring. As the plants come out of dormancy (painfully slow for me!), they begin to develop fine roots which are able to take up moisture.

Or will the roots obsorb the water once water resumes? I think the fine roots die when plants are allowed to go bone dry. As I said above, in spring new fine roots are generated from the older, larger, more succulent roots. That's my guess. Perhaps the larger roots are able to absorb some water, but not much.

Am I suppose to cut off all the old roots in the pot and repot it in spring or can I continue to grow the plant in the pot without having to do anything to it.? Depends on how large the pot is for the plant size. I usually don't repot until the plant is actively growing, like in late June. Others repot before while still dormant -- but if you do that, be sure not to overwater. If you need to keep the rootball smaller (say, for example it's already in a 10 gallon pot and you have no room to pot up), I'd probably trim and repot while still dormant, but don't wanter, then when you see it coming to life, gradually increase your watering.

Just stick the plant back outside when it is warm.? Is this part of the previous question? Yes, I let the plant come out of dormancy first (in the old pot). My plants usually start stirring by April indoors. Some take longer. When moving it outside make sure it does not stay cold and wet. '...when it is warm' for plumerias means when night-time lows are reliably above 50 degrees F. This applies to spring only. In fall they can take lower temps in my experience.

One other thing. If you get rooted cuttings that have no leaves yet in which I did, They came soiless, can I pot them up and water as I would any other plant in a well draining soil? They came to me rooted on grafts but no soil. They I potted them up and wondering if I can water. Absolutely pot them up, but water rather sparingly until you do see leaves. No leaves = no transpiration and water takeup by the plant which yeilds overly wet soil which can bring on root or stem rot. There's no sense in pushing them into growth unless you have greenhouse conditions or a very sunny, warm window. The plant will sulk until new roots are generated anyway. Some people use B1 and Superthrive at this point. Don't fertilize until summer. Even if it has some roots, it will take a while to get back into the swing of things, and it may be wanting to go dormant anyway.

Hi Dave,
great info..glad to see you came in. Learned a lot, thanks.
Karen B.

Yes Karen, I briefly woke up from my winter hibernation to get a snack and I thought I'd check out the Plumeria Forum. OK now, I'm going back to bed and sleep off the rest of this winter. The plumerias are all safe inside and mostly dormant except for four that insist on blooming! See ya in the Spring! Yawwwn....

Dave and all the others that answered my question ...Thankyou very much..Now I can get some sleep eye!!!!! I love thgis forum and thank God for individuals like you all that take the time to help others with your experiences.....Now If I can find a supplier any where in the south that sell great fast draining potting soil instead of having to make it and guess for our citrus trees and Plumerias I would be thrilled!!!

...is available at our Home Depot.

Dave..U say u get the aquatic soil at homedepot? Which one is it you get it at...Cuz none around here sell it, me living in Massachusetts never get any choise of anything good. They never even heard of the stuff? Please let me know and thanks alot for that info.

Mike, sorry about that. Yes, not all Home Depots are created equal I guess. I found the stuff in my local Home Depot (Merrifield, VA) in the 'Pond' section of the garden center. (it's made for use in the planting of pond plants). Haven't checked lately -- maybe it's a seasonal thing. I usually don't venture into the 'Garden' section of Home Depot around Christmas because it's all just Christmas stuff.

Thanks Dave....Would u believe I found sum at Lowes!!! I can't wait to see how it works fro me too!
Happy citrus growing!!!!:-)

Mike, I use the Jungle Grow from Lowes on my potted plants. It is fast draining and you could also add perlite to make it more airy (is that a word)LOL.