Ultima Online Five on Friday Q&A

Another week, another set of questions for Ultima Online.
Why can't we cross-pollinate the plants?

"The plan had been to allow cross-pollination but, after looking into it, a number of factors made me decide against it. First, drafting the right cross-pollination chart for this many new plants would require a significant amount of time. But assuming we had delayed publishing these additions to draft that chart, we would then meet issue #2: Art. I actually took a stab at the chart, but aside from a handful of the new plants, there is no possible logical correlation between the existing plants and the new ones. By no stretch of the imagination would combining an existing plant to one of the new seeds result in another one of the new plants. In order to get that 5th generation, new art would be required which isn't possible at the current time."