Seeding ornamental turf in Spring is tough; one is sorta fighting nature which always wins …
Here are some notes from last threads on this topic that I copied and pasted into my own notes, hopefully they are of assist to you:
Poa - What to do?
From Suburban Jungle Life Weds MAR 20, 2019:
this timing of products is only for fescue.
I apply meso (Tenacity) at 0.184floz/M
NOTE: (x 2 = 0.368floz OR TRANSLATES INTO 10.883 mil / 2M sf PER 4 Gal Sprayer Tank
and etho (Poa Constrictor) 1.5floz/M the day of seeding.
I seed once summer heat breaks but not long after. If you seed late, poa will have germinated already.
Etho is safe 2 weeks post germination so I reapply 4 weeks after seeding.
Meso is safe 4 weeks after germinaton so I apply that 6 weeks after seeding.
I usually don't have a long fall so I don't bother with Prodiamine but if you do, that is 2 months post germination.
I do use Prodiamine in the spring though.
Seeding, meso, etho.
4 weeks post seeding, etho
6 weeks post seeding, meso
8 weeks post seeding, Prodiamine if needed.
Spring, Prodiamine before poa germinates.
this timing of products is only for fescue.
If you're seeding in the Fall, best results will be had in CT (NC?) if you Aerate/Overseed or Slice Seed during the last week of August or the first week of September. This will give you 8 weeks of excellent growing weather with NO Crabgrass competition and very minimal weed competition. Remember, you'll need 10-30 days for seed germination (depending upon which seed you select) and an additional 21-30 days to grow those blades to be thick and healthy. If seeding during this time, Substitute a Starter Fertilizer (18-24-12) on the August 19th date and reapply it at 3 week intervals until the lawn is full and thick. Once you've reached that point, you can apply a Winterizer (21-3-21) to finish off your season.
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this timing of products is only for fescue.
- Day of seeding Tenacity + Ethofumesate (No Surfactant)
- 4 weeks after day of seeding Tenacity + Ethofumesate (No Surfactant)
- 60 Days after germination use Prodiamine
- Then in the Spring use Dithiopyr as your PreM
this timing of products is only for fescue.
PreM options for POA A while overseeding?