Originally Posted By: ChaoticMoira
The ONLY hybrids I have gotten were next to the rare plants I got by other means.

Interesting. I have never gotten a hybrid next to rare plants I purchased from the vendor, or grew from a seed given to me by a generous bestie. Never. I have gotten hybrids next to the common plants, but I can't tell you a pattern that works.

Originally Posted By: ChaoticMoira
I am tempted to try the 3 tiered fertilizer and see if anything happens as it is the only one not directly linked to specific plants. I feel like it must have another use, but I don't know what that is.

I don't have anywhere near all the plants (5 common, 4 tier 2, and 5 tier 3), so I've always thought it is for rare hybrids I haven't managed to grow yet.