What Does Snapdragon Need to Grow?

Sun

• Snapdragons are cool season perennials that may be grown in USDA zones 4 to 11. In USDA zones 9 to 11, snapdragons may be planted in the winter, where they will flower so long as frosts are brief. In cooler climates, snapdragons are suitable as frost-tender spring and summer perennials.They will suffer if planted during blisteringly hot summers. Snapdragons will produce the most flowers when grown in full sunlight. They will tolerate partial shade however, especially in warmer climates.

Soil

• Snapdragons do best in a well-draining soil enhanced with organic matter. Water regularly to keep the soil moist to the touch. Regular watering is especially important for the first few weeks after transplanting, as young plants are establishing their roots. Plants grown in light, sandy soil will need to be watered more frequently than those grown in an organic, moisture-retentive soil. If flowering becomes sporadic, remove dead flowers and apply a balanced fertilizer to the soil. Water first before fertilizing to keep from burning the plant's roots.

Proper Planting

• When planting snapdragons, space plants at least 10 inches apart to provide proper air circulation. Crowded plants are more likely to keep moisture and develop fungal problems. Do not plant too deeply, as wet soil can push against the stem and lead to rot. If frosts are expected, provide a thin layer of organic mulch to keep the plant warm. Snapdragons may be propagated by seed. Start seeds indoors about six to eight weeks before the last frosts of spring, then move outdoors to a suitable location.

Maintenance

• Pinch back spent flowers to prolong the bloom period and give the plant an overall tidier look. Check new flower buds and leaves occasionally for aphids, which can disfigure the plant. Aphids may be washed off with a direct stream of water. Some of the taller varieties may need to be staked when immature to keep them from falling over. Once mature, the plants will become bushier and more stable, and the stakes may be removed.