Flowers, are certainly abundant in Animal Crossing Wild World. But, personally, I think Red, White, & Yellow can get quite boring. For those who agree with me, I'm going to compile a guide of all regular colors & what they produce when coupled with another color.
NOTE: All flowers have to be coupled with the same type of flower to produce a hybrid.

•ROSES•

•2 RED=red black
•1 RED & 1 WHITE=a red, white, or a pink
•1 RED & 1 YELLOW=red, yellow, orange
•2 WHITE=white or purple
•1BLACK & 1 PURPLE=black, purple, or blue
note: Water the black rose with a gold watering can to get a gold rose

•TULIPS•

•2 RED=red or BLACK
•1 RED & 1 WHITE=red, white, or pink
•1 RED & 1 YELLOW=red, yellow, or purple
•2 YELLOW=yellow or black

Pansies & Cosmos are in part 2 of 2. Thank you.