Ask Mr. Smarty Plants

Taxodium distichum (bald cypress) is one of our favorite trees, graceful and interesting year-round. We think, however, you are worrying unnecessarily. The leaf color in various resources was listed as "green," "sage green" and "light green." Floridata has an excellent website on the Bald cypress, part of which we are going to quote to save ourselves some typing.

"Culture: Bald-cypress likes an acidic soil and will develop yellowing of the leaves if grown in neutral or calcareous soils. Young trees grow rapidly, but they can live 500 years or more.
Light: Young seedlings and saplings can tolerate light shade, but they will need full sun to reach their maximum potential.
Moisture: Although they occur naturally in the wettest of places, bald-cypress will thrive in normal, even dry soil. I long ago learned from an old forester that plants don't grow where they grow best; they grow where they can get away with it. Bald-cypress is just about the only tree that can survive long periods of flooding. But, it will grow faster, larger, and be healthier if not subjected to flooding at all. Bald-cypress doesn't often get the chance to grow in rich, well drained soils because other trees (that can't tolerate prolonged flooding) out-compete it. Established bald-cypress trees are surprisingly tolerant of drought.
Hardiness: USDA Zones 5-10"

That may be the new slogan for gardeners: "Plants don't grow where they grow best; they grow where they can get away with it." We think both of your trees have adjusted to the soils they found, and are getting away with it just fine.

Taxodium distichum

Taxodium distichum

Taxodium distichum