Liquid fertilizers can have a shelf life between 8-10 years if stored properly (refer to expiration date on product label or contact the manufacturer for more details since all products vary). Depending on the type of fertilizer (Granular or Liquid) you purchased will determine the life of your product. Liquid fertilizers can have a shelf life between 8-10 years if stored properly (refer to expiration date on product label or contact the manufacturer for more details since all products vary). Does anyone out there know the shelf life for lime. Moreover, does fertilizer expire? I used some that I think is two years old and some that is one year old. This fertilizer won’t expire quickly, and its shelf life is approximately eight to ten years. bag of Scott's Turf Builder for free. According to Scotts , if it is stored in a cool, dry place, the seeds can last up to 2-3 years. 3. If you are looking for a quick and easy guide for when to fertilize a lawn, late summer and fall are the optimal times for most lawns. Liquid fertilizer. Synthetic plant food does not go bad when stored properly, although organic fertilizer, such … The easiest thing to do is to use a fertilizer that comes close to ratios you need which is spelled out in Option 1, 2, and 3 in your soil test. Does fertilizer "expire?" I am having second thoughts although I know it's a little late. You mentioned you had individual fertilizers. fertilizer is subject to brake down with heat and light so if its been in a cool place were its relatively dark it will be OK the worst that will happen is you wont get much of a response from your plants Plant food can range from synthetic chemicals and organic fertilizers, which are added periodically, to compost, which improves soil's nutritional content and overall structure. The general answer is no, fertilizer does not go bad if it is properly stored. So, how long does it last? See below for a seasonal lawn fertilizer schedule: When To Fertilize A Lawn – A General Guide. If the fertilizer has not gotten wet, and is still in the original pellet form, it is as good to use today as the day it was bagged at the factory. This is contrary to the popular belief that spring is the best time to fertilize. Liquid mineral fertilizer – If it contains minerals diluted in liquid, you don’t need to worry. My supplier said it's fine as long as it hasn't been wet and clumped. If stored dry and out of the sun, soil food and lawn food are good indefinitely. Re: Does fertilizer expire? Granular fertilizer has an extensive life if stored properly. The lump is still good fertilizer, just hard to use when it is in a lump. It was a ripped open bag and would not close completey, but I kept it in my shed so it stayed dry. In general, the shelf life of liquid fertilizer will depend on the type of solution it is made of. 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