Hello!
DO-SI-DOS claims to be a very large auto :)
And I'm glad of that. Very good genetics. A very fast auto strain
I can compare it to two other autoflowers in same tent. So DO-SI-DOS was planted 5 days later and grew bigger almost twice. Of course the genetic - is first reason.
One more difference from other autoflows plants is that I immediately planted DO-SI-DOS in a large pot - this accelerated growth, since any transplant is stressful and for autoflower strains it is minus a week of growth - will greatly affect the result.