Last year my 4-foot-high Orido nishiki emerged in spring with a splash of pink, white, and green varietated leaves. This year about 90% of the leaves are pure green. The tree seems very healthy; is now 5 feet high and doing very well. Should I worry, or is it just that some years behave differently than others? (BTW, my Butterfly is showing less variegation and less pink this spring than last year as well.) Could it be due to the wet and warm winter/early spring we had?