Now you see it, soon you won’t

Our yellowwood at its peak bloom

After a scorching (90 degrees) day yesterday, I set out this morning to see what damage an early dollop of heat had done to our (primarily) native plant garden in Medfield, Massachusetts. I thought I would focus on our Cladrastis kentuckyea (yellowwood), but there was so much going on, I was outside for the better part of an hour.

This afternoon, there is a carpet
of pink under the tree.

Yellowwoods bloom only once every two years. This year was the most prolific in the tree's ten-year history and, for the past week, it has been a captivating sight in our garden. But the sudden heat forced the tree to make conservation choices.  As I suspected it would, the tree went into overdrive to protect itself, which meant cutting off energy and water to its pantacles of flowers. Two days ago, there were no dropped petals. At noon, there is a carpet of pale pink. If those thunderstorms come to pass this afternoon, the yellowwood’s 2025 bloom will end a little over a week from when it began. That’s my definition of ‘short’.

From brilliant white to brown
in a day.

The maple leaf viburnum (Viburnum acerifolium) went from bright, white flowers to yellow-brown faded ones in a single day.  The shrub has been in bloom for two weeks and so maybe its flowering was about to end anyway; but the totality of the change caught me off guard.

But the same heat that ended flowers also begat them.  The American fringetree (Chionanthus virginicus) in our back garden had what I considered a so-so bloom this year 

Our fringetree's color popped.

– you had to be standing a foot from the bloom to see it. This afternoon, those flowers are front and center – twice as large and bright as two days ago. Will they be gone by the weekend? Maybe, but they’re giving me a great send-off if they are.

The Sisyrinchium (blue-eyed grass)
was apparently biding its time.

Just as surprising, though, was the emergence of flowers where there were none in what had up until now been a cool, damp spring.  We have multiple clusters of Sisyrinchium, better known as blue-eyed grass, around the garden. I usually expect to see it sometime in late June. Well, five different clusters showed themselves today; and they definitely weren’t there on Wednesday. The bloom period isn’t that long – perhaps two weeks – and it’s a one-bloom-and-done kind of plant, in that it won’t please the eye again until next June.

Our ninebark's flowers popped
with the heat.

Finally, the heat got our multiple specimens of Physocarpius opulifolius (ninebark) to open their flowers. They’ve been at that ‘will-they-or-won’t-they’ stage for ten days or more. Well, today they did. The sign at the base of one of the shrubs was acquired this past weekend at the Grow Native Massachusetts plant sale in Lexington.  I had the pleasure to help put it together, and to work the event both days. Principal Undergardeners are assumed to be have skills most closely related to digging holes and moving rocks.  Therefore, I did my duty in the event’s parking lot. There are no small roles; only small players. Happy to have been one of them!