My old ancient tree that bloomed for the first time last year, formed seed pods last fall. While in the greenhouse, the 1/2" pods are now a nice 6" long. The other set are getting fatter, and about 8" long. Both are very green. The tall tree is still somewhat dormant but has signs of leafing out.

Can you tell me how much longer she will stay "pregnant"? What the pods will look like just before they break open? What is the best way to "catch" the seeds? A net bag?? I think it might be fun to try to start some from seed especially since this plant is so old and came from a dear friend who has since passed on, And I would be glad to share some seeds, too. Can I expect the babies to be the same flower as the mom, a fragrant very large white flower? This is fun. We've never been Plumeria Pregnant before!

Cheryl the seedpods take appr. 9 months to mature. Before they 'pop', they will start looking dull and a crack may appear along the center. A net bag is a good way to catch the seeds.
If your plumeria is a variety of Plumeria rubra the seeds will not come true to the parent, so you can actually have a new variety.
The seeds of the other species do come true. Can you show us a picture of the flower and leaf? that will help.

And congratulations!!

Here is the thread when she bloomed last year. I pulled her out of the GH and believe it or not, there is a flower bud wanting to open!!

The thread "Flower from my 20 year wait" in Plumeria forum

One day the seed pod turned brown and I reminded myself to put a net over it the next day. But the very next day, it looked like this :



I do netted the pod as I cut it off.



The seed looks big, a lot bigger than the ones I bought on Ebay! These are about 2" long! Can O remove the ones still on the pods. Are they ready for immediate planting in perlite?

The pod opening signals that the seeds are ready to be planted. Mother Nature is letting them go!
Personally I plant them in vermiculite and mist regularly.

Different plumeria will have different size seeds, by the way.

I am new to this forum and I have many new Plumaria plants how do I get seed pods to grow on my Plumaria plants can someone help me please I have them all over my yard? Please help? Thank you so much

Generally a healthy environment in which pollinators are present will ensure that you will get at least some seedpods. If a lot of spraying of insecticides is done in your area that will obviously work against that.
You can try 'twirling' the open flowers with a piece of fishing line to encourage pollination.

How does the twirling exactly have to occur how do I do that can you please explain it to me thank you so much

If you google twirling plumeria there are several videos available online. I can't attach a video here.