After a soil sample my local extension office noted that I need to fertilize with 15-0-15 50% slow release on May 1st and July 1st at 6lb per 1000sqft. I have not applied any fertilizer yet (May 16th today). Should I still use the slow release since I am 15 days behind on my schedule, adjust my fertilizer weight, use a fast realease. Any suggestions will be helpfull, all products will be purchased from Lesco if you feel I should try something else. Thanks playersc.