Louisiana Iris Seeds

By Hooker T. Nichols

This article is about how a relative new Louisiana iris hybridizer handles his ripened  Louisiana iris seeds.  There are two different roads one can travel upon when it comes time to harvest  your fully mature seeds and either plant them immediately or simply place them in a dry container until planting later  on in the year.

Cynthia Maldonado with seeds. Image from The Louisiana Iris Conservation Initiative  

Some of the few seasoned longtime  hybridizers harvest the seeds from the stalks when the pods begin to  turn nearly white just before they turn brow.  Some will tell you to plant the seeds immediately without nicking the corner of the seed or completely removing the cork covering from the seeds.  I personally have never  had the time to plant the seeds early post bloom season because as soon as the iris quit blooming I morph into a daylily and begin hybridizing daylilies.  If planted directly  into the soil or  individual gallon black pots you will get some  germination before fall  with the majority the following spring.

Image from The Louisiana Iris Conservation Initiative

I simply allow my pods to completely dry (turn brown) on the stalks.  I remove the seeds from  the ripened pods and place the complete  seed  lot  in  a Styrofoam cup.   After they have air dried, I put the cups in a cabinet and leave them there until early February.  Then each seed lot is planted in a one gallon black  pot with good soil.  In less than six weeks  I begin getting germination.  When the seedlings are  3  to 4 inches tall, I  transplant each seedling into its  own individual gallon pot when  it remains until September.  They are liquid fertilized every seven days until early September.  By that time, each  seedling has formed a small clump.  I tap the plant clumps out of  the pots and line them  out.  I get about 100% bloom the following spring because of out mild  winters and long growing season which is 200+ days per year.

Drawing Plate I. Dormon Caroline  By Their Fruits.

Following removing the seedlings from the pots, I then place the pots in full sun and let them bake all summer.  In early September I start watering the pots from which the 3-4 inch seedlings were earlier transplanted.  You will get another rush of germination.  The pots are healed in for the winter and the process is repeated again.  After the second individual transplanting is complete, I then dump the pots.

Louisianas bloom the same time as  the Spuria irises.  They are a  wonderful  way to extend your iris bloom season.   Try growing some of  the new Pseudata irises  and you can extend your iris  season  several more  weeks.

 Louisianas are adaptable to almost all soil types.    Plant the rhizomes about three inches in depth, fertilize them twice  a month  with either liquid or granular  fertilizer.  In hot areas, you much mulch them and one good watering a week in  the summer will keep them from going dormant. 

 This is the way I grow Louisiana iris in Texas and success has come my way.