What Is The Difference Between A Mulberry And A Blackberry?

Mulberries grow on trees while blackberries grow on thorny bushes, and the quickest way to tell them apart is by looking at the core — mulberries.

You spot a dark cluster of berries on a walk and wonder whether they’re safe to grab. The fruit looks similar enough — small and bumpy, dark purple or black. But reach for the wrong one and you might tangle with thorns, or pick a berry that tastes completely different than expected.

The honest answer: they’re easy to mix up at first glance, but once you know what to look for — the plant, the core, the shape — you’ll never confuse them again. This guide breaks down the key differences between a mulberry and a blackberry so you can identify, cook with, and enjoy each one with confidence.

Tree Versus Bush: The Plant Tells The Story

The single most reliable way to tell these berries apart is to check the plant they grow on. Mulberries come from the mulberry tree (genus Morus), which can grow 30 to 50 feet tall. Blackberries come from a thorny bush or shrub (genus Rubus) that sends out long, arching canes.

That growth habit matters. A mulberry tree has a single woody trunk and branches that spread out overhead. A blackberry plant is shorter, denser, and covered in thorns — pickers quickly learn to wear long sleeves and gloves around blackberry canes.

Mulberry trees are generally thornless, which makes harvesting simpler. Blackberry canes, by contrast, are notorious for their sharp prickles. Look at the plant first, and you’ll have your answer before you even touch the fruit.

Why The Core Matters Most

If you’ve already picked the berries, the fastest ID trick is to look at the center. Blackberries have a solid white core (called the receptacle) that stays attached to the fruit when you pull it off the stem. Mulberries are hollow — the receptacle stays on the tree, so each berry has a hole running through its center.

This difference is botanically meaningful. Both are aggregate fruits made of many tiny drupelets clustered together, but the way they attach to the plant sets them apart. Here are other quick visual and sensory differences:

• Shape and size: Mulberries grow longer and more elongated compared to the average blackberry, which is rounder and bumpier. You can often spot a mulberry by its slightly cylindrical look.
• Color range: Mulberries come in a variety of colors including white, red, and black, while blackberries are almost always dark purple or black when ripe.
• Leaf shape: Mulberry leaves are typically heart-shaped with serrated edges, while blackberry leaves are compound, consisting of three to five leaflets.
• Taste: Blackberries have a tart, tangy flavor, while mulberries are generally sweeter with a flavor profile similar to a mild blackberry or raspberry.

Once you check the core and the shape, you’ll rarely second-guess yourself again.

Which Berry Is Healthier?

Both are packed with antioxidants, fiber, and vitamins A, C, E, and K, as well as calcium, magnesium, and potassium. But the nutritional profiles differ in ways that might matter depending on your goals. The mulberry tree vs blackberry bush review notes both fruits are excellent sources of protective plant compounds.

Blackberries come out ahead for fiber — about 7 to 8 grams per cup — and are richer in vitamin K, vitamin E, and folate. Mulberries are the better choice for vitamin C (roughly 57% of the Daily Value per cup) and also provide more iron and B vitamins like riboflavin and B6.

If you’re focused on digestion and fullness, blackberries may have a slight edge. If immune support or iron intake is your priority, mulberries can help fill that niche.

Nutritional Comparison At A Glance

These values are approximate and vary by berry size and growing conditions. Both fruits make a solid addition to a balanced diet, just with different strengths.

How To Identify, Pick, And Use Each Berry

Foraging or shopping? Here are practical steps to tell them apart and make the most of each one:

1. Check the plant first: Mulberries grow on a tall tree with smooth, gray bark. Blackberries grow on a low, thorny bush. This is the fastest way to identify them in the wild.
2. Look at the core: If the berry has a hollow center, it’s a mulberry. If there’s a solid white core inside, it’s a blackberry. This test works even after cooking or freezing.
3. Watch for color variety: Mulberries can be white, red, or nearly black. Blackberries are almost always a deep purple-black when fully ripe. A berry that’s white or pinkish is almost certainly a mulberry.
4. Consider availability: Blackberries are widely available in grocery stores and supermarkets. Mulberries are less common commercially due to their delicate nature and short shelf life — you’ll often find them at farmers’ markets or on the tree itself.

Once you’ve identified them, both work well in jams, pies, smoothies, and fresh eating. Mulberries are so soft they almost melt in your mouth, while blackberries hold their shape better in baked goods.

How Cooking And Storage Differ

Because mulberries are softer and more delicate, they spoil faster than blackberries. Refrigerate them and use within a day or two for the best flavor. Blackberries, with their firmer structure, can last 3 to 5 days in the fridge if you keep them dry and unwashed.

In cooked dishes, the difference in texture matters. According to the elongated mulberry shape guide, the longer, softer mulberry breaks down quickly in heat, making it ideal for syrups, sauces, and smoothies. Blackberries hold their individual drupelets better, so they’re a good choice when you want recognizable fruit in a pie or crumble.

Both freeze well for later use. Spread them in a single layer on a baking sheet until frozen solid, then transfer to a bag. Frozen mulberries are especially useful for winter smoothies when fresh berries aren’t available.

Quick Reference: Leaf And Growth Differences

The Bottom Line

Mulberries and blackberries look similar but differ in plant type, core structure, shape, taste, and nutrition. The fastest ID: check the plant (tree vs. bush) or the core (hollow vs. solid white). Both are nutritious, but blackberries offer more fiber and vitamin K, while mulberries deliver more vitamin C and iron.

Whether you’re foraging a mulberry tree or buying blackberries from the store, a quick look at the core or the plant takes away the guesswork. If you’re unsure of a berry’s identity and have dietary restrictions or health concerns, a registered dietitian or local extension office can help confirm safe identification and fit the fruit into your eating plan.