We are now a part of a CSA (that delivers) and have received zucchini 3 times. Thus I have made 3 zucchini breads. The first was probably over baked a bit. It was also made from all whole wheat flour and upon reflection, the resulting batter wasn't as liquid as it should have been. It ended up much dryer than preferred.
The second batch had a random flour assortment. It was a little over 1/3rd whole wheat flour, a little under 1/3 all-purpose flour and the remainder bread flour. It still turned out tasty, but I should check my flour supply prior to grating the zucchini and cracking the eggs.
Today I made the third iteration. I used a 2/3rds 1/3rd whole wheat to all-purpose flour mix. The batter seemed fine, but I think the oven was a little hotter than 350. It's still good, but ever so slightly dry.
As an experiment I'm going to try using melted butter in place of the coconut oil the next time we're sent zucchini.