I actually found this to be one of the simpler rainbows.
Red Honey
Grow many red flowers and any red flower that has a bee hovering over it will produce red honey.
Tuna
Very simple the tuna can be caught mainly on East Gull Island.
Perfect Honeydew
You can do one of two things
Go togamefaqs.com to see the answer they have lots of answers for that one.
you have to complete the first rainbow (green) and then talk to the captain in on the hook
By completing the first rainbow.
Once you get Alan's rainbow, go on it. You will be at the top of the mountain. Walk to the left and you will find his tree.
first you have to have completed darens rainbow, if you havn't, then do it, after you have done that you need to go over that rainbow to get to gull island where you meet the harvest sprite named collin. you then have to complete his rainbow (it is kinda complicated) and cross his rainbow, then you arrive on the other gull island. from there walk along the beach where a cutscene should appear, you should get the badge in that cutscene... Hope i helped!!!!
after you complete darens rainbow
you have to complete the third rainbow(blue) and then cross the rainbow bridge and your there!
Complete the first rainbow quest
Complete the yellow rainbow and find it in the unlocked area
you need to complete the Green rainbow so people can move into town.
Go togamefaqs.com to see the answer they have lots of answers for that one.
you have to complete the first rainbow (green) and then talk to the captain in on the hook
When you complete the rainbow that stills the water, he will arrive after a few people already have.
You have to complete 2 or more rainbow recipes to get to that mountain but you first have to befriend a mother bear
you need to complete one of the rainbows, get their sprite badge, and walk over the rainbow.
You need to complete collin's rainbow. Cross the rainbow to the 2nd gull island and then it will cutsence when you are exploring the beach and you find ben's badge. Hopefully
The first rainbow you do. do Darrens first