The Josee lilac (Syringa vulgaris 'Josee') is a three-way cross between S. meyeri, S. patula and S. microphylla. This dwarf lilac is advertised as a reblooming variety. However, it is more inclined to rebloom in cooler c... More »

www.reference.com Home & Garden Gardening & Landscapes Outdoor Plants & Flowers

Trim back a new lilac bush when it is 6 to 8 feet tall. Prune older bushes when the flowers fade so that the next year's batch of flowers can start to grow. More »

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Lack of sufficient sunlight and too much nitrogen in the soil are reasons a lilac blush does not flower. Another reason a lilac bush does not flower is an incorrect amount of pruning at the wrong time. More »

www.reference.com Home & Garden Gardening & Landscapes Outdoor Plants & Flowers

Pruning Persian lilacs is essential for keeping the plants healthy and encouraging growth. Without regular pruning, new blooms are slow to form and the lilac bush may begin to look messy or unattractive. Using a pair of ... More »

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The Vanhoutte spirea, or S. vanhouttei, commonly known as a bridal wreath spirea, is a flowering, deciduous shrub native to China, Canada and the United States. The Vanhoutte spirea is a hybrid cross between the Three-lo... More »

www.reference.com Home & Garden Gardening & Landscapes Outdoor Plants & Flowers

Lack of sufficient sunlight and too much nitrogen in the soil are reasons a lilac blush does not flower. Another reason a lilac bush does not flower is an incorrect amount of pruning at the wrong time. More »

www.reference.com Home & Garden Gardening & Landscapes Outdoor Plants & Flowers

Lilacs fail to bloom when they receive too little sun or water, excess fertilizer or too much pruning, according to Gardens Alive! Climate also affects lilacs, which need cold weather to thrive. More »

www.reference.com Home & Garden Gardening & Landscapes Outdoor Plants & Flowers