IMO, "Best" is subjective. What I may like, you may not. "Best" will also be variable depending on the area of the country you live, your growing conditions, and what you are growing them in. I have been to trials all over North America, and while Opera Supreme Purple may look the "best" at trials in Chicago, they may not look as nice as Wave Purple in South Carolina. There are at least a dozen very nice prostrate series of petunias from seed on the market, I have yet to see a complete series that I would say is better than all of the rest. All of the series have some really good individual colors in them, and they all have some colors that aren't as well matched in habit or performance. Throw in all of the dozens of prostrate series that are propagated from cuttings, then start looking at all of the series with different flower sizes, and there are literally thousands of varieties of petunias on the market to choose from, just in the prostrate spreading class. If I were forced to choose right now, I would say that the Plush Series from Syngenta Flowers has probably some of the nicest genetics out there right now.

ah...I figured that might be the case.

Hey, is that color accurate (or nearly so) on that deep purple Plush? Wowza!

If you are looking at the photo on the Syngenta site, yep, that is pretty accurate!

I haven't tried the plush series, but have grown the ramblin' as long as they have been out as well as all the wave types, and like the ramblin' better.

I was reading some years ago about some annuals in 'series'. I have noticed that some colours seem more robust than others, and always wondered why, exactly. Anyway this article went on to explain that all the plants in a series weren't necessarily of the same genetic line. That sometimes lines are supplemented to provide better colour diversity by finding them in other lines with similar growth and maturity habits and sort of adopting them. Don't know if it was true or not, but it was a technical bulletin of some sort.

I had a harder time germinating Avalance than any other petunia.

My favorites this year are the shock waves. I don't need to deadhead them ever. The old flowers just fall and it pretty much doesn't go to seed.

I planted them in september, they started flowering in october and never stopped, even during my hot and humid brazilian summer that killed almost all my ramblin petunias.

Even though they're great, I'd like to add that the plant is a mounding monster and will take over the container, unless you plant it along with other petunias which will grow as fast as this one (mine killed a trailing verbena and an ivy geranium).

Ivory and purple are the most vigorous, and Ivory smells great.. it's the first spreading petunia that I grow that smells like old petunias.