Tropicals & Tender Perennials: Begoinia 'Wild Pony' ???, 0 by CTMGGardener

CTMGGardener wrote:
Begonia 'Wild Pony' came by mail the other day. At first I thought they shipped the wrong plant as the entire plant seemed olive in color. Then I noticed that one old base leaf did have a mottled coloration when viewed from the back like 'Wild Pony'. My question is: if this is 'Wild Pony', then why did the leaf color change? Too much sun? Fertilizer? Or is it just a poor hybrid?

The photo shows the newer leaf on the left and the older mottled leaf on the right.