Will Rogers Zinnia

Zinnias need full sun and well-drained soil with a pH of 6.0-7.5. They prefer soil that is high in organic matter, such as compost or aged manure, and should be watered regularly. Mulching is also recommended to help retain moisture and keep weeds at bay.

After danger of frost has passed, sow seeds 1/8" deep in average, well-drained soil. Germination will occur in 5-24 days. After germination has occurred, thin to one seedling every 10-12". Can also be started indoors about six weeks before the average last frost date.

Harden off seedlings for a few days prior to transplanting. After danger of frost has passed, dig a hole roughly the size of the root ball and lower the seedling in, being careful not to disturb the roots. Backfill with loose soil and water well. Space plants 10-12" in all directions. Keep well-watered until the plants are established.

Insect Pests

Diseases & Other Problems

Zinnia are generally easy-to-grow and disease-resistant, but can be affected by powdery mildew, rust, and bacterial leaf spot. Provide plants adequate space to promote airflow and limit disease.

CONSIDERATIONS:

If growing more than one variety of zinnia, plants must be isolated to prevent cross-pollination. To isolate, cage varieties separately and remove one cage each day or cut all blooms from one variety to allow the other to pollinate without contamination. Repeat with the remaining variety once the first seed crop has matured. Harvest zinnia seeds when the flower heads are dry and brown. Cut off the flower heads and place them in a paper bag to dry further. Once dry, rub the flower heads to release the seeds. Store the seeds in a cool, dry place.

HARVESTING SEED:

SEED LONGETIVITY:

Zinnia seeds can remain viable for up to three years if stored in a cool, dry place.