No, homemade compost doesn't exactly "go bad" like food, but it can lose potency, become unbalanced, or develop unpleasant anaerobic conditions (smelly, slimy) if stored improperly, though it generally just keeps decomposing into richer soil; it's best used when mature (dark, crumbly, earthy smell) but can be revived or used for mulching even if old, just with some nutrient loss over time or if left exposed.
Compost is at its best for three to four months after it is completed, but it can still be used after that. Compost does not go bad, but after a year it may start to shrink as it breaks down further. If it starts to smell bad, add more brown material and turn it in with a shovel or pitchfork.
Summary: warm, earthy-smelling, crumbly and active = composting; cold, slimy, foul-smelling, waterlogged and unchanged = rotting. Use smell, temperature, moisture and a quick turn to diagnose and correct problems.
here are four things. that you never wanna add to your compost bin. number one. diseased plants. this can introduce disease into your compost. we definitely don't want that. number two. weeds that have gone to seed. we don't want these sprouting. in our compost bin. number three wood ash. wood ash increases the ph ...
The symptoms of acute compost toxicity usually occur 30 minutes to three hours after initial ingestion. These symptoms can include agitation, hyperthermia (increased temperature), vomiting, panting, drooling, tremors and seizures.
7 mistakes that could ruin your compost
Backyard compost piles often do not heat up to 130 to 150 degrees F so typically pathogens are not controlled in home piles. Compost is the natural breakdown product of leaves, stems, manures and other organic materials - and, a potential source of the pathogens that cause foodborne illness.
Breaking Down Composting and Understanding the Basics
However, compost can only effectively improve soil quality if the organic stream remains clean. When non-compostable materials, such as conventional plastics, glass, metals, and produce stickers end up in the compost mix, they can easily derail the entire process.
Toilet paper rolls are made from cardboard, so they are compostable! As long as these rolls aren't contaminated, they're a great addition to your compost bucket. Plus, it's a simple and easy solution to dispose of them.
Home composting
Do not put meat, bones or fish scraps in your home composter (as these could attract pests), put these in your black bin. Do not put animal waste in your compost bin either, particularly if you are going to use it to grow food. Previous What can I compost at home?
Using pee: a how-to guide. Keep in mind that urine is very high in nitrogen. You may need to pee daily, but your plants don't need your daily pee. Choose plants that need lots of nitrogen, such as corn and squash, tomatoes and cucumbers during their fruit-bearing stage, and older plants that need a boost.
The 5 common mistakes in worm composting are overfeeding, which causes smells and pests; incorrect moisture, making it too wet (anaerobic) or dry (dehydration); wrong food choices, avoiding meat/dairy/oils; poor ventilation/temperature, leading to suffocation or extreme heat; and ignoring bedding balance, failing to mix carbon ("browns") and nitrogen ("greens") for proper bedding. These errors create unhealthy environments, stressing or killing worms, and leading to system failure.
The Science Behind the Compost Combustion Theory
Scientific experts report that combustion is possible but only in extremely rare circumstances and it is near impossible to ignite a small domestic heap. It can happen with very large dry heaps or haystacks and as such sizes over 2x2 meters are considered as a risk.
Although it might come as a surprise to many, it's a well known fact among the gardening community that urine can speed up the composting process! The uric acid present in urine in rich in nitrogen acts as a compost activator.
What weeds shouldn't you compost?
Turning once a week or once every two weeks had generally lower decomposition rates. To maintain a thermophilic pile (pile with high heat), it should be turned every three to four days, or when the temperature drops below 104 F. However, if most of the material has been decomposed, less frequent turning is adequate.
Eating any food while on the toilet is forbidden. After defecating, the anus must be washed with water using the left hand, or an odd number of smooth stones or pebbles called jamrah or hijaarah (Sahih Al-Bukhari 161, Book 4, Hadith 27). Many jurists agree that toilet paper suffices in place of these stones.
Paper cartons are compostable!
If you have a home compost, rip up your paper egg carton into small pieces and add it in! These cartons are made from paperboard, which works as a “brown”, carbon material to help the pile break down more quickly.
Plumbers often advise against Charmin because its plush, thick, multi-ply versions don't dissolve quickly, leading to stubborn clogs, especially in older pipes or septic systems, unlike thinner papers that break down easily and allow for smoother flow. While great for comfort, Charmin's durability and high absorbency make it prone to clumping and buildup, creating blockages that can cause significant plumbing problems and costly repairs.
You should not compost onions, garlic, and citrus peels in large amounts (they're too acidic/repel worms), diseased plants (spreads illness), Black Walnut tree debris (toxic juglone), and any vegetables cooked with oils, fats, dairy, or meat, as these attract pests and disrupt the balance, but many vegetable scraps like peels, stalks, and leaves are great for compost.
Some things, like grass cuttings and weeds, rot quickly. They work as 'activators', getting the composting started. Older and tougher plant material is slower to rot, but gives body to it, and usually will make up the bulk of your compost heap.
If you have access to an 'elsan' or chemical toilet disposal point, toilet or greywater drain, these are also ideal for emptying into. Never pour urine into a canal or waterway – over time, it has the potential to promote excessive algal growth, which can lead to eutrophication (lack of oxygen) of the waterway.
Human urine is beneficial as part of a composting system as it has a high nitrogen content along with containing potassium and phosphorus. These three are the main nutrients that are essential to healthy plant growth and ones that you see referred to as NPK on plant fertilizer labels.
March 15, 2025. Dogs can become seriously ill from eating compost. The fungal microorganisms that break down organic matter produce neurotoxins that are highly dangerous for pets, potentially causing seizures and other life-threatening symptoms.
A yard of fallen leaves may seem like a mess. But hidden in all that decomposing foliage is the perfect organic matter for a great pile of compost.