The Northern Sun Forsythia-Tree form, Forsythia 'Northern Sun', is a hardy Forsythia with huge bright yellow flowers in early spring before the foliage appears. The medium green foliage, on arching branches, is attractive all season. The tree form Forsythia makes a great vertical accent in a border or as a foundation plant. The clear yellow flowers, 3/4" wide and 1" in length, appear before foliage in late April. A vigorous grower, it is adapted to a wide range of soils and has no serious pests. It is best planted in full sun to encourage free flowering. It is specifically recommended for landscape use in Minnesota and other northern areas where common Forsythias are not reliably hardy. Renewal pruning is useful to keep the plant shorter and more compact.