Can a dwarf lilac bush die from sitting in too much water too long?

Yes, a dwarf lilac bush can die from sitting in too much water for too long. Lilacs prefer well-drained soil and are susceptible to root rot if their roots remain saturated. Prolonged exposure to excess moisture can lead to stress, disease, and ultimately the death of the plant. It's essential to ensure proper drainage and avoid overwatering to keep the lilac healthy.