The Practical Garden-Book · C. E. Hunn and L. H. Bailey
ZINNIA. Showy hardy annuals. The old formal type of Zinnias has given place to a race of freer forms which are excellent plants either for color effect or for cutting. The colors have been varied and brightened, the flowers doubled and the plants dwarfed. Seed should be sown in a hotbed or house in March, transplanted once at least before planting out, and set in well enriched soil. Or, the seed may be sown where the plants are to grow. The tall varieties (3 feet) should stand 18 to 24 inches apart. These are best for masses at a distance.
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