Properly sited, as the season progresses the centers turn yellow, then gold, then a brassy gold, while the borders turn from light cream to pure white. Having tested this hosta for the last several years, we find it to be entirely stable in expression and form. Like its parents, 'Invocation' attains a spread of about 40". Individual leaves at maturity are about 11" by 7". It is a good grower, forming a striking clump in just a couple seasons, but even as a yearling it provides a focal point.