Although getting blue dream cuttings (it IS a clone only strain ) is the BEST way to get a good blue dream I have had pretty good luck with seeds. The humboldt seeds I purchased (3years ago) produced a very nice blue dream with 3x stretch for sure! Seedling transferred and grown in a 7 gal smartpot with organic soil (nugz recipe) only. Led 600w viparspectra and 0-10-10 fish and molasses during flowering. I trained it as a manifold (cut twice) for the first time and got 10 gigantic colas. It went from a 18” plant to almost 5’ and fast!! I had to rope (1/8” elestic nylon cord) them together they got such long colas!
*It is imperative that the led stays high enough or you will get what LOOKS like a magnesium deficiency but is not (yellow spots on leaves) Raise the light and it gets better.
Overall I think humboldt seeds are great, you can find something very close to actual blue dream you just have to select them with care. I had two very indica looking babies that didn't make it and this one appeared similar to a baby haze (sativa leaf structure). It grew into a nice blue dream during flower. When you see a good structure early, clone it right away for a mother in case it turns out great!