Granular fertilizer has an extensive life if stored properly. 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. 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 See below for a seasonal lawn fertilizer schedule: When To Fertilize A Lawn – A General Guide. So, how long does it last? The lump is still good fertilizer, just hard to use when it is in a lump. 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. 3. It was a ripped open bag and would not close completey, but I kept it in my shed so it stayed dry. bag of Scott's Turf Builder for free. Does fertilizer expire? 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 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. I'm pretty new to lawn care so forgive me if this is a stupid question, but I have this fertilizer in my garage which has been sitting there for a few years now and I applied it last night and watered after cutting, but I was wondering if the fertilizer is still as effective as it was because it is so old. The general answer is no, fertilizer does not go bad if it is properly stored. In general, the shelf life of liquid fertilizer will depend on the type of solution it is made of. If stored dry and out of the sun, soil food and lawn food are good indefinitely. 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 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. I am having second thoughts although I know it's a little late. Since fertilizers never have 100% of the nutrient, calculations are necessary to determine the amount to use. Liquid mineral fertilizer – If it contains minerals diluted in liquid, you don’t need to worry. A friend gave me a 50lb. Liquid fertilizer. The general answer is no, fertilizer does not go bad if it is properly stored. Re: Does fertilizer expire? Moreover, does fertilizer expire? Synthetic plant food does not go bad when stored properly, although organic fertilizer, such … You will need to crush it into small pellets again to spread it properly. You mentioned you had individual fertilizers. 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). According to Scotts , if it is stored in a cool, dry place, the seeds can last up to 2-3 years. This is contrary to the popular belief that spring is the best time to fertilize. Depending on the type of fertilizer (Granular or Liquid) you purchased will determine the life of your product. 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. My supplier said it's fine as long as it hasn't been wet and clumped. 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