I planted via spray -throw-mow on Monday and wanted to put some fertilizer on the plot tomorrow…I assume his won't be a problem will it? My only concern is "burning" anything that has germinated already. Lots of rain expected for the next week.
I wouldn't worry about it, personally. Especially with the rain coming. We fertilized 2 weeks ago and our sorghum shot up and got caught up on seed head production big time.