Why Are My Squash Rotting On The Ends

Your squash are rotting on the ends because of a common garden problem called blossom end rot.
 
If you’ve been asking yourself, “why are my squash rotting on the ends,” you’re definitely not alone.
 
It’s one of the most frustrating things to see in the vegetable garden, especially when the rest of the plant looks perfectly healthy.
 
The good news is that squash rotting on the ends is usually fixable, and it’s rarely caused by a disease or pest.
 
In this post, we’ll take a closer look at why your squash are rotting on the ends, what causes it, and how to stop it.
 
Let’s dig in.
 

Why Are My Squash Rotting on the Ends?

Squash rotting on the ends is almost always a sign of blossom end rot, a disorder that affects summer and winter squash alike.
 
It typically shows up as a dark, sunken, leathery spot on the blossom end of the fruit, the opposite end from where the stem attaches.
 
Here’s why your squash are rotting on the ends:
 

1. Calcium Deficiency in the Fruit

The number one reason squash rot on the ends is a lack of calcium reaching the developing fruit.
 
Calcium is essential for building strong cell walls, and when the fruit doesn’t get enough, those cells break down and rot.
 
Interestingly, your soil might have plenty of calcium, but the plant still can’t take it up.
 
That’s why squash rotting on the ends is often a delivery problem, not a soil problem.
 

2. Inconsistent Watering

If you’ve ever wondered why your squash are rotting on the ends despite feeding them well, watering is usually the culprit.
 
Calcium moves through the plant with water, so dry spells followed by heavy soaking disrupt that flow.
 
When the plant can’t move calcium fast enough to the growing squash, the ends start to rot.
 
Keeping your soil evenly moist is one of the best ways to prevent squash rotting on the ends.
 

3. Too Much Nitrogen Fertilizer

Another reason squash rot on the ends is an overload of nitrogen.
 
Nitrogen pushes lots of leafy green growth, which looks great but pulls calcium away from the fruit.
 
So if your squash plants are huge and lush but the fruit keeps rotting on the ends, ease up on the nitrogen.
 
A balanced fertilizer or a calcium-rich feed works much better for squash.
 

4. Root Damage or Poor Soil

Squash rotting on the ends can also happen when roots are damaged or the soil is too compacted.
 
Damaged roots can’t absorb water and nutrients properly, which limits calcium uptake.
 
Compacted or overly wet soil has the same effect, and that’s when you’ll notice squash rotting on the ends.
 
Loosening the soil and avoiding root disturbance helps keep calcium flowing.
 

How to Stop Squash Rotting on the Ends

Now that you know why your squash are rotting on the ends, here’s how to fix it.
 
The key is to focus on consistent care rather than quick fixes.
 

1. Water Deeply and Regularly

Water your squash deeply once or twice a week rather than a little every day.
 
This encourages strong roots and steady calcium movement, which keeps squash from rotting on the ends.
 
A layer of mulch also helps hold moisture so the soil doesn’t dry out between waterings.
 

2. Add Calcium to the Soil

If squash keep rotting on the ends, amend the soil with gypsum or crushed eggshells before planting.
 
You can also spray a calcium foliar feed directly on the leaves, though it works best as prevention.
 
Adding calcium won’t fix fruit that’s already rotting on the ends, but it protects new squash.
 

3. Remove Affected Fruit

When squash are rotting on the ends, remove the damaged fruit right away.
 
Leaving rotting squash on the plant wastes energy and can attract pests.
 
Toss the affected squash so the plant can put its energy into healthy new fruit instead of the ones rotting on the ends.
 

4. Keep the Soil pH in Check

Squash grow best in soil with a pH between 6.0 and 6.8, where calcium is most available.
 
If the pH is too low, squash start rotting on the ends because the plant simply can’t access calcium.
 
A simple soil test tells you whether you need to adjust things to stop squash rotting on the ends.
 

5. Avoid Over-Fertilizing

Stick to balanced fertilizer and skip the heavy nitrogen boosts if squash are rotting on the ends.
 
Too much nitrogen causes fast leaf growth at the expense of fruit development.
 
Feeding moderately keeps your plants healthy and prevents squash from rotting on the ends.
 

So, Why Are My Squash Rotting on the Ends?

Squash are rotting on the ends because of blossom end rot, which is caused by a calcium shortage in the fruit.
 
Inconsistent watering, too much nitrogen, root damage, and poor soil all play a role in squash rotting on the ends.
 
Fix it by watering evenly, adding calcium, removing affected fruit, and keeping your soil healthy.
 
With a little patience, you can stop squash from rotting on the ends and enjoy a healthy harvest.