Laburnum. The flower clusters may not be as long as in an established tree. Still beautiful.
Redmond linden. Also growing nicely. Also no sign of flowers. The leaves are lighter green, and larger, compared with Greenspire.
Greenspire linden. All are growing nicely. No sign yet of flower buds. Maybe none the first year.
I think all of the trees planted last summer and fall will need water approximately weekly this summer. They are mulched as well.