The lavender sorbet was the easiest---I took my simple syrup and watered it down!
It actually turns out I didn't water it down quite enough, and so my lavender sorbet was much more liquid than my other three sorbets. Remember, adding sugar (just like salt) decreases the freezing point, so if your sorbet is too syrupy, add less sugar next time. If your sorbet is too much like a popsicle, add more sugar.
Rhubarb requires deep well drained sandy loam to loam soil with a good supply of organic matter. Heavy soils are satisfactory if they are well drained but the structure should be improved with manure or other forms of organic matter, also raised beds may be considered.