Yes, that is a plus. It's very rare to find 2-gallon roses on line.
Are they appreciably larger than the 1-gallon roses from Roses Unlimited? I pay $8 for shipping on each of their roses (which comes out to 50% of the purchase price), but it's worth it because they have a lot of roses I don't already have. Besides, they have great sales, so I hardly ever pay full price for their roses.
