The Zinnia, a native of Mexico, is one of the favorite flowering annuals, growing easily and being much used in the decoration of the flower-border and also for bedding. It thrives best in a deep rich soil and a sunny situation.
Sow the seeds, one-eighth of an inch deep, in a warm greenhouse or frame in early March, or in the open border in April. When they are two inches high, prick off the young seedlings four inches apart, in boxes, if they have been raised under glass, or, if sown where they are to bloom, thin them out to one foot apart. About the first of June top-dress the surface of the ground with old manure and give abundance of water during the growing season. If mulching is objected to, keep the soil hoed after each watering, to prevent it from baking and cracking. The Zinnias, from the time the young plants germinate, should be kept growing freely; at no time should they be allowed a check either from poor soil or from want of water, as the least check to their growth causes them to throw poor small flowers, and they never seem to do well afterwards.