Space plants to allow for ultimate growth. Forsythias are widely tolerant of soil types and pH but prefer a good, loose, well-drained soil. A location in full sun will maximize flower production.
Forsythia will flower on the previous season’s wood; to this end, prune severely each year immediately after flowering, cutting approx imately 1/3 of the older branches back to the ground.
A balanced fertilizer applied each year as plants begin to leaf out will also promote growth and optimum flowering. In the northern zones, buds above the snow line may be injured during severe winter; protection with evergreen boughs will help prevent this.