I don't germinate any seeds in direct sun unless they are sown directly in the garden. I also keep the plumeria seedlings in indirect light for a while and acclimate them slowly to direct sunlight.
Karyn

I've never germinated seeds in direct sunlight, I've always kept them in the shade and never had a problem.

Hi I am John from Athens-Greece.
I have germinate many plumeria seeds but never under sunlight speciialy at summer, the rason is that seeds and soil dry out very quickly and also they don't have humidity, without humidity the shell get dry and strong and the first leaves can't throw out the sheel and and baby seedling mould.
You can see my 8 months seedlings
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greekman, what kind of sprinkler system do you have? That's pretty neat.

Hi plumienewbiesd,
the black jet/nozzle on the top spray the water like umbrella its for watering the pots. uunder the black is the blue jet/nozzle its for humidity (spraying the water in very light quantity).

In the following picture at left top picture you can see
1) 2 Programmable Irrigation Controller working with batteries.
The first is GARDENA and the second GALCON.
I use the first for my plants and the second only for my plumeria seedlings.

2. On the Controller is connected F20 plastic black pipe (you can see it on the ground)which going between the pots.

3. with F20 is connected a thiner black plastic pipe and to the end is connected with the black jet/nozzle and another thiner black pipe is connected with the blue jet/nozzle.

With the above automatic watering and spraying system, 3 minutes every day is well enough for watering and all my plumerias pots and to get the needed humidity.
Of course every 5-7 days I fertilize the seedlings with a can.
sorry because my English ys n't in high level, I hope to be understood.

Greekman that's an interesting irrigation system you have there. I've seen the drip systems similar to the one you have in the top two pics but I haven't seen the overhead ones that you have. I like your set up. Did you design/make it yourself? BTW your English is quite good : )
Karyn

Hi karyn,
yes I design/make it my self, dont forget that I have more than 400 pots.
Drip system is ok for small pots but not for the bigs because the top surface of the soil stays dry and the bottom have very high humidity and thats is not good for the roots, specially for the trees the feeding roots are on the top of the soil (olives-lemons etc)thats is the reason that I use the black jet/nozzle (spraying the water as like umbrella, of course all of them are adjustable (watering radius according pot size)
Don't forget for watering with hand I need more than an hour and with the mentioned system only in 3 minutes all the pots watering automatically without to be hear.
You can take an idea visit the following link with my veranda vew.
http://s263.photobucket.com/albums/ii135/olma156/?start=0

If you need much more informations about this system,or if you want to design a system according your needs, contact me at : olma156@yahoo.gr
I am hobbyist of course.
John
from Greece

Hi John, I checked out your photo album. You've got quite an impressive operation going on! Your selection of plants and trees is awesome! Do you sell your plumeria? I find caring for my measly 131 plumeria (lol) very relaxing. Thanks for sharing your photos with us all! Crafty

I'm impressed. We have a drip set up in the big greenhouse but nothing overhead except misters and all were purchased from a greenhouse supply company. I like what you have done much better and might like to try something similar in my small backyard GH. As soon as I have a bit more spare time I'd like to contact you about how you made the set up. Thanks for the offer.
Karyn