Instant Seed Growth
I'm not sure what I am doing to get this to happen, but here is what I have:
I have one house with the maximum number of plots for growing seeds (10 at this point with 15 Sims) and I collect most of my active Sims there for easier control. I have realized that when I go through and plant all at once, sometimes 1 (or even more) of them will grow their seeds instantly and I can harvest and replant. So far I have just seen this with the quicker seeds (I usually do 30 minute/1 hour seeds) and I don't know if it would also happen with the slower growing seeds.
Hope this works for others too!
Edited: Jan 14 2012
Added by: Fionasays Jan 12th 2012, ID#419