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Interseeding question

Posted by Oak_Ridge Wisconsin (My Page) on
Sat, Dec 17, 05 at 19:09

I have an approximatly one acre area that I just started to restore. I am using the interseeding technique (seeding into existing vegetation). The area has a lot of smooth brome and canada goldenrod, along with a fair amount of remnant prairie species. My plan is to do late spring burns every year for the next 10 or so years to weaken the brome and help the native species outcompete it. I will be interseeding native prairie species into the area every year (mostly seed I collect myself). My question is on the timing for seeding. Would it be better to fall seed, or seed immediatly after the spring burns? I think I would get better seed-soil contact seeding into the ashs after a spring burn, but would not get the CM stratification of forbs that a fall seeding would. With a fall seeding I have the advantage of frost action getting seed-soil contact (assuming the seeds can get through the brome grass to the soil). If I seed in the fall would my burn the following spring nuke some of the seed? Also, does anybody have any experience winter seeding onto snow? I live in Wisconsin and probably won't see bare ground until next March.

Follow-Up Postings:

RE: Interseeding question

its a bit late for my comfort for winter seeding im my little corner of wisconsin. the idea is that the action of winter will bring the seed into soil contact nicely but now u have 3+" of frost, the seed could just as easily be swept away in the next 3 months of winter. i have a few sites that responded to a frozen ground seeding very poorly and i believe the seed was physically swept away. vs a late fall seeding or light snow that soon melted seeding which is (IMO) the best for bulk seedings. and if one has an incline, this is by far the superior way to insert seeds.

interseeding works great and i highly recommend that everyone is continuing to seed. but u just named 2 ugly 'weeds' and u got alot of work ahead of u. read up on mangement techniques, this link is one of many good books on the subject.

u mentioned late spring burn. why not a fall burn? why not a fall burn the seed? no strat, no muss, no fuss. i find that a fall burn is easier to control, more productive in management of many woodies and easier to find the time then the spring burns. after this fall burn, one has usually a good month or so of black earth and light snow to seed into before we get snowcover and (in his best football voice) 'the frozen tundra of Lambeau'. now i know as well as u do that the last few years we havnt had that snow cover until late if ever...but im the eternal optimist. spring seeding are too close to summer for my liking.

brome burns hot and low, it could easily damage a newly seeded area. i would try to stay away from that scenario.

lastly ill say that certainly some seeds are better suited for fall, some for spring, some for summer, some respond much better when CS or 90CS or any of the other multitude of scenarios that they want. i have a rule of thumb that ill share.
if they say CS, i throw them out in the fall. if they say nothing or innoculate, i throw them out in the spring. then there are all the exceptions. that is why i usually seed an area in at least 3 times over with 3 diff mix's.

RE: Interseeding question

Thanks for the information Froggy. The reason for the late spring burn opposed to a fall burn is that I have been told that this hurts the smooth brome the most. I was told to wait until I had at least 6 inches of green growth on the brome to conduct a spring fire.

I am also leary ot seeding on top of snow, especially since my area all has slope and erosion potential. The reason I was considering it is that Prairie Moon Nursery claims that frost seeding between layers of snow is very effective.

I like your rule of thumb about timing of seeding, which brings up another question. Last year I seeded some purple and white prairie clover, and round headed bush clover during november (going against your rule of spring seeding things that require innoculation). I had very poor results. The seed I used was boughten de-chaffed seed. Somebody later told me that using using de-chaffed purple prairie clover seed usually yeilds poor results when fall seeded, but good results when spring seeded. They said that using unprocessed (chaff not removed) seed will work much better for fall seeding. Anybody have any experience with this? Also will the innoculum over-winter when on the soil surface?

I posted my original post on the Native Plants forum also and a user replyed that fire may actually stimulate some prairie species to germinate. If anybody is interested in this topic I would suggest you check out his reply to my post on the native plants forum. I did some searching and found some research that shows that indeed some species exhitit increased germination rates when exposed to fire. The mechanism for some species is the heat, for others it is chemicals contained in the smoke. Very interesting stuff. Here is a link:

I am still wary of burning up all that expensive seed!!!

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