When did the lilac grow the fastest during the 13-week period? Explain how you know.

Lilacs tend to grow most vigorously in late spring when temperatures are consistently warm and soil moisture is adequate. This growth phase typically occurs around mid to late May, depending on the climate. You can observe growth patterns by measuring the height of the plants weekly, noting when they show marked increases, often right after blooming begins, as they channel energy into growth and leaf formation after their flower display. If you want to confirm this trend, you can keep a growth journal, recording your observations and measurements throughout the 13 weeks. This will help you identify not just the peak growth week but also the conditions that fostered that growth, such as weather patterns, watering schedules, and any fertilization you might’ve used. Keeping tabs on these factors will make you a lilac-growing pro in no time!