Black Locust seedling leafed out in July July 8, 2014 3264 × 2448 July update of Permaculture in Colorado Black Locust seedling leafed out in July Black Locust seedling leafed out in July. About 25 black locust seedlings were planted this year and most of them look healthy. These were only watered when planted. 2014 has been a great year for rain.