Growing Lily-of-the-Valley (Convallaria)
Although the-of-the-Valley is not a true bulb, it is normally included with bulbous subjects. The best results are secured when the crowns are planted in partial shade and where , and old manure have been added to the soil. Generous treatment will encourage the plants to continue flowering freely over many years and they need only be disturbed and thinned when they become overcrowded. Plant the crowns 3 to 4 in. apart. An annual topdressing of compost or decayed manure applied when the foliage has died down will be a great help in the continued production of large bells. Neglected plants produce increasingly small flowers. When picking the flowers, always leave at least one leaf since this foliage is vital if the following year’s flowers are to develop.
Lily-of-the-Valley will respond well to forcing when planted into pots or boxes. Retarded crowns are sometimes available and they can be had in flower within three or four weeks from the time of planting and are particularly valuable for producing blooms at Christmas.