Changing product prices in FloristWare is very easy. Simply enter at the Manager Level, click "Settings" and then choose "Products" from the pull-down menu and click "Continue". From there you can access all of your products and make changes as you see fit.
If you need to change a lot of prices because it's a floral holiday you might want to try another approach. For example, all of your rose prices are probably higher at Valentines Day. Instead of changing the prices for all of them you may find it easier to create a special category of Valentines roses with Valentines pricing. You will turn this category on during the Valentines season and off the rest of the year - that way you won't have to see it. This will save you the trouble of changing the prices back and forth.