@Nuswodahs (name?) "shadowsun" so far what you said on these new batch seems to be correct.
The majority of my plumerias are from seeds. So you will have plumerias that no one has. But they could take years to bloom.
I have always kept my seeds moist but not soaking wet. If the top dirt is dry, the bottom might still be wet. I grow my seeds in part shade where it gets the morning sun but not the full sun. The most important is the pots have a good drain and not soaking wet. If you touch the dirt and they are dry, you can spray lightly with water. Some seeds are just too old and not viable.
For the cuttings, I leave mine in full sun, on a pavement. Bottom heat is important to speed up the rooting. If you soak the dirt really good when you planted the cuttings (assuming you let the cutting callous before planting) most everyone say wait until 4 sets of leaves are out before you resume watering. Plumerias could grow leaves or buds even when it is not planted on the dirt. But I am like you, I worry that the dirt is too dry. So just to make me feel better when I notice the dirt is too dry to my touch, I normally spray just a tiny bit on the stem and slightly the top dirt but definitely making sure it is not soaking wet. I do this in the morning before the sun hits the cuttings. Cuttings do not have roots and overwatering could result to rotting. Plumeria cuttings don't like wet feet.
I try not to fertilize my seedlings until they are 12 inches tall. For fertilizer I use osmocote and others use dynamite. But if you used miracle gro you don't have to worry about adding fertilizer since it already has some. Just add the slow release on the second or third month when the leaves are out and you start watering. I do give them super bloom every 2 weeks for 2 to 3 months to force them to bloom. But even without fertilizer 6 to 8 hours of full sun will help it bloom. Up potting too when it has full leaves help make it grow faster too. Once leaves are out, I normally put them in bigger pots with good drainage so they can get bigger fast.
Happy growing
and keep us posted.
