Parshvik Chintan wrote:for indoor growing i cannot think of a really good reason to AF (especially since you can't propagate it, making you depending on purchasing seeds)
That always seemed to me the most powerful reason behind AF. They turn the grower dependent on the seed provider, by taking away the timing and propagation control.
I can see they are an interesting adaptation for growers living in cold climates, but most of the alleged advantages of AF strains are arguable, to say the least. They have short life cycles and allow the grower to harvest the plant earlier - but the time edge is lost because of smaller yields. Actually, a steady propagation using clones from a good mother plant will deliver a much bigger harvest per time unit in the long run.
And even if you intend to grow only a small amount and want to work from seed, no clones involved, the days saved with an AF don't pay off IMO. Most likely, you will use more light hours overall, and the results generally show it's not cost-effective. A timer for your light fixture costs only a few bucks and it's set up in a minute, and you get to decide when to switch it to 12/12.
So, to the OP - Yes, they are in average smaller and wimpier than regular plants. They have C. Ruderalis genes... and there's a reason why C. Sativa has been clearly preferred through history.
"The Menu is Not The Meal." - Alan Watts