Super old thread but great info here. I've been dealing with nitrogen toxicity ever since going to this super soil thing and it sucks monkey balls. How can a slow release organic amendment that takes about 2 weeks (or longer) to break down cause a nitrogen toxicity? .... there's enough nutes in the soil by itself to begin with..thats how. So you've done the bone head move and are dealing with it again, what now? Throw a straw (or sawdust) mulch layer and just wait it out I guess. Nitrogen is used up as the mulch layer begins to break down at the soil level. Don't understand it all but know that some biolgical thing is happening there, like when you throw grass and fallen leaves in a compost bin, it eventually turns into soil magically, or some kind of science behind it but it happens.