I make several batches of this each summer when the fireweed in Alaska is in bloom. My kids always help pick the blooms and are always eager to eat the finished product. Its important that only the blooms are harvested - not the stems. Also, I have tried this recipe several times with Certo and it will not set so be sure to use Sure-Jell or a powdered pectin. Prep time is estimated (depends on how long it takes you to pick fireweed, I guess!) Extra juice can be stored in fridge or freezer.