luis_pr said: Hard to say as they are so recently planted. Paniculatas bloom best in full sun. Perhaps they need more sun or their recent transplant and root disturbance is going to make late this first summer. Little Lime is advertised as a mid-season bloomer but there is no mention about the Punch cultivar. Give it time to see how it performs performs in late summer/fall and-or consider a more sunny location. Personally, I would not be concerned on year one too much as I prefer that they develop a larger root system instead. And Punch is a brand new introduction so monitor what it does between now and the end of the growing season. Like one does with other plants like roses in year one.
Be mindful of your average date of first frost (around 3rd-4th weeks of October) if you are tempted of adding still more slow release fertilizers as too much nitrogen can cause the shrubs to develop nice foliage at the expense of blooms. It is also quite hot now to be fertilizing and stressing the plants. The last application of a slow release fertilizer in Chicago should be done three months prior to your average date of first frost (the average is late October)... or about now but, you can also use quick release fertilizers between now and then instead, just choose low nitrogen and high phosphorus formulations. Or like I said earlier, just monitor them without fertilizing or pruning. Maintain the soil evenly moist, mulch and provide some sun... the more sun, the better.
Make sure that water from the two downspouts is not collecting at the two ends of the Little Lime Punch hedge. For some reason, the one in the middle of the hedge (and furthest away from the downspouts) is the only one currently blooming.
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