Why Are Pumpkins Orange?
Updated: Oct 7
October arrives, and suddenly pumpkins are everywhere.
They sit on porches, fill farm stands, appear in pies, decorate classrooms, and eventually become jack-o’-lanterns.
But have you ever stopped to wonder why so many pumpkins are orange?
The answer is hiding inside the pumpkin itself.
Meet the Carotenoids
The familiar orange color of many pumpkins comes largely from pigments called carotenoids.
Carotenoids are a large family of naturally occurring plant compounds. Different members of the family contribute yellow, orange, and reddish colors to many fruits and vegetables.
One particularly familiar carotenoid found in pumpkin is beta-carotene.
The name offers a clue to another famous source: carrots.
Beta-carotene and related pigments help create the warm colors we associate with foods such as carrots, sweet potatoes, winter squash, and pumpkins.
Plants aren't producing those colors to decorate our autumn porches, of course. Carotenoids have important jobs within plants, including participating in photosynthesis and helping protect plant tissues from excess light.
But Pumpkins Start Out Green
If you have ever grown pumpkins, you may have noticed something interesting.
Many varieties don't begin as bright orange fruits.
While a pumpkin develops, green chlorophyll can dominate its appearance. As the fruit matures, chlorophyll breaks down and the colors produced by other pigments become more visible.
Gradually, that familiar pumpkin color emerges.
It is one of those wonderful examples of plant chemistry happening right in front of us.
Are All Pumpkins Orange?
Not even close.
Pumpkins come in an astonishing assortment of colors, shapes, textures, and sizes.
Depending on the variety, you can find pumpkins that are white, yellow, tan, reddish, green, blue-gray, nearly black, or combinations of several colors.
Some are tiny enough to fit in your hand. Others can grow to enormous sizes.
And those differences aren't accidents.
For generations, people have selected and grown different varieties for characteristics they wanted to preserve-color, flavor, storage ability, shape, size, texture, or usefulness for cooking and decoration.
So the classic round orange pumpkin is only one member of a much larger and more interesting family.
A Pumpkin Is More Than a Halloween Decoration
When we carve a pumpkin, it is easy to forget that we are holding a remarkable fruit produced by a living plant.
Inside are seeds capable of beginning the process again.
The flesh contains pigments created through plant chemistry.
The rind protected the developing fruit.
And that brilliant October orange tells part of the story of the compounds inside it.
That is exactly the sort of thing I love about plants.
Something as ordinary as a pumpkin can sit on a porch for weeks without anyone realizing how much is going on beneath its skin.
And in Harvest Grove, pumpkins happen to have another story waiting for them.
But that one belongs to Alpha and Beta.
The pumpkins are melting and falling apart! Their story is finally here!
