How to know if zucchini is spoiled

In this brief article, we will answer ‘How to know if zucchini is spoiled’. This article will also discuss the proper way of storing zucchini to improve its shelf life.

How to know if zucchini is spoiled?   

Rotten spots on the skin with a dull skin and sloppy flesh means that the zucchini is spoiled. When zucchini goes bad, you will notice that the seeds will be huge once you cut it open.

  1. Wrinkled skin

Once zucchini starts to get old, the skin becomes wrinkly which does not necessarily mean that it is spoiled but the taste might have changed because of the aging.

  1. Bad taste

Taste a little piece of zucchini to check how the taste has changed. If the taste is moldy and tastes acidic then it is better to throw it away. 

  1. Decaying spots

Dark spots on the skin of zucchini means that it is spoiled. These dark spots are mostly because of bacteria.

  1. Stringy flesh 

Cut into the fruit to check whether the flesh looks plump or not. If the flesh is stringy or you find lumpy growths on the inside with huge seeds then the fruit is spoiled. 

What does a rubbery zucchini texture mean?

A rubbery texture means that the zucchini is very close to going bad so if you plan to cook it, you should do it immediately. Make sure that you check for any mold growing inside which will mean that it is already spoiled.

How to identify good zucchini?

When you buy zucchini look for the one which is about 6 to 8 inches long, which is its length after complete harvestation. It should not be too hard but instead feel firm with a shiny skin. Fresh zucchini has a buttery texture when you cut through it with a fresh yellow to white. 

Shelf life of zucchini 

You can keep zucchini at room temperature for 3 days without washing it. Washing the squash will make it age dramatically. If you store it inside the refrigerator then it will be fresh for a week. You can increase the shelf life by storing the fruit in a cool and dry place which keeps away bacteria.  

How to store zucchini

After you have confirmed that the zucchini is fresh and firm, wrap it in a paper towel which will keep it safe from any moisture and put it in a plastic bag. This way, the zucchini will remain fresh and you can keep it in the refrigerator for about a week or even two while it is still good to eat.

If you want to use dry zucchini then store it in a dark and cool pantry area that will prevent moisture. However, if the zucchini does get watery, you won’t be able to eat it in salads so it is better to cook it. 

It is better to observe zucchini for any spoiled areas by cutting it lengthwise and looking if any moldy areas run deep into the fruit. If the sloppy area is only a small part then you can cut it away while eating the rest of the zucchini. 

Freezing zucchini to prevent mold growth 

Zucchini is very famous in summers but you can’t consume it all in one day. Therefore, to make it fresh for a longer time you can freeze the zucchini. This will prevent any molds from growing.

How to freeze zucchini?

Cut the zucchini into small blocks to freeze them instead of a whole zucchini. Blanch these blocks of zucchini in boiling water for a few seconds before you drain them in cold water which will stop the cooking process. 

Dry the zucchini with a paper towel and spread them out on a pan to put inside the freezer. After 15 minutes, you should transfer these blocks of zucchini to an air-tight container and put them safely in the freezer while they remain fresh to eat for a few weeks. 

Is it okay to eat bitter zucchini?

A bitter zucchini means that it is spoiled because of the excessive amount of naturally occurring chemicals inside the zucchini. If you eat a bitter zucchini, this will give you a bad stomach with gastrointestinal problems as well. 

It is better to buy zucchini from the farmer’s market because those will be freshly harvested and there are very few chances of a spoiled one. If you still have any doubts then you can use your senses to look for signs mentioned in this blog.


In this brief article, we answered ‘How to know if zucchini is spoiled’. This article also discussed the proper way of storing zucchini to improve its shelf life.


Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.