How to Plant and Grow Zinnia Seeds

January 26, 2009

A few people have asked how to plant and grow zinnia seeds. If you have any questions about how to do anything to do with gardening let me know and I will write a post on it.

To plant the zinnia seeds you should find a nice open spot with mostly sun. A little shade in the afternoon won’t hurt. You need average soil to plant the zinnias. The better the soil the bigger they will grow.

Sow the seeds 1/8 deep and press the seeds into the soil. Don’t ever go deeper that a 1/4 inch. Keep the soil moist but not soggy until the plants are up 2 or 3 inches. Water the soil and not the plant when you are watering zinnias.  If you water the leaves they will probably get a fungus on them eventually. After they are a few inches tall let the soil dry out to 3/8 inch deep before you water again. Zinnias love the heat and sun but will need more water if it gets really hot.

After the zinnias are about 6 inches tall put a layer of mulch down so you wont’ have to water them so much. Once the plants begin to flower they should flower until they are killed by frost. You should be able to enjoy the zinnias for several months. If you have any questions or comments about zinnia or any other kind of flower seeds just put your comment below and I will answer it right away.


7 Responses to “How to Plant and Grow Zinnia Seeds”

  1. Ginny on January 26th, 2009 2:06 am

    We get drought a lot here in South Carolina, how will zinnias fare here?

    I really appreciate your tips here as to how to plant zinnias correctly. As a relatively new gardener I can use all the Flower 101 courses I can find.

    Keep them coming!

  2. Jeff Dahlberg on January 26th, 2009 2:22 am

    Zinnias are native to Mexico and South America so they should do well in South Carolina.

  3. Shannon on March 21st, 2011 10:06 am

    I was going to sow these right into my flower beds, but they have already been mulched. Do you think it would be ok to plant them in the dirt and cover with mulch? The mulch isn’t too thick, maybe 2-3 inches.

  4. Jeff Dahlberg on March 21st, 2011 3:06 pm

    Shannon I would move the mulch back in about 1 foot circles down to the soil. Then I would plant the seeds in the soil and leave the mulch off until the zinnias are up 4 - 5 inches. Then put the much back on. If you have any other question make another comment. Thanks. Jeff

  5. Shannon on March 21st, 2011 6:47 pm

    When is a good time to plant? I’m in TN near the GA border, already its 70 during the day and about 40-50 at night.

  6. Jeff Dahlberg on March 21st, 2011 7:43 pm

    If there is no chance of frost you can plant them now.

  7. Shannon on March 22nd, 2011 10:41 am

    Last question. How many seeds should I plant in like a 1 foot diameter circle?

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