Why Are My Carrots Green at the Top?

You pull a carrot and the top inch or two, the "shoulders" around the crown, has turned green instead of orange. Green shoulders are extremely common and, unlike many carrot faults, the cause is simple and obvious once you know it: sunlight reached the top of the root. It is a cosmetic issue more than a serious one, but it is easy to prevent. Let me explain.

The cause: sunlight on the crown

Carrots grow with the top of the root at or near the soil surface, and as they swell, the shoulders often push up out of the ground and become exposed to light. Just like a potato turning green, the exposed part of the carrot produces chlorophyll and turns green where the sun hits it. It has nothing to do with disease, pests, or soil problems — it is purely a reaction to light on the root. This is why the green is always at the top, the part that pokes above the soil, and never deeper down.

Is green carrot safe to eat?

This is where carrots differ from potatoes. The green on a carrot shoulder is just chlorophyll and is not toxic the way green potato is — carrots do not produce the same harmful solanine. The green part is safe to eat, though it tends to taste bitter and less sweet than the orange flesh. Most people simply cut off the green shoulder for the best flavour, but you do not need to throw the carrot away. So green shoulders are a quality and taste issue, not a safety one.

How to prevent it

Prevention is easy: keep the carrot shoulders covered with soil. As the carrots grow and their tops begin to show, draw a little soil up over the exposed crowns — a practice called earthing up or hilling, the same idea used for potatoes. Mulching over the row also blocks the light and keeps the shoulders covered. Sowing at a sensible depth and not too sparsely (so the foliage shades the soil) helps too. A layer of mulch or a quick hilling-up once or twice during growth keeps the whole root orange.

The simple routine

To avoid green carrots: watch for shoulders poking above the soil as the roots swell, and cover them with soil or mulch when they do. It takes a moment and keeps your carrots fully coloured and sweet to the top. And if you do harvest some with green shoulders, just trim the green off — the rest of the carrot is perfectly good. It is one of the most easily solved carrot problems once you know to keep the crowns in the dark.