Korean Counter 그루: How to Count trees

Use native Korean numbers with 그루 to count trees, large plants.

The Rule

그루 is the counter for trees: trees, large plants. In Korean, you can't just say a number + noun. You MUST use a counter word between them. This is like English "two SHEETS of paper" or "three CUPS of coffee" — except Korean does this for EVERYTHING. Even "three apples" needs a counter: 사과 세 개.

Why English Speakers Get It Wrong

English only uses counters for uncountable nouns ("a glass of water", "a piece of cake"). Korean uses counters for ALL nouns — even ones English counts directly. The second trap: Korean has TWO number systems. 그루 uses native Korean (하나, 둘, 셋...) numbers. Using the wrong system is a common mistake that sounds immediately wrong to Korean ears.

How It Works

Pattern: Noun + Number + 그루 Native Korean numbers (shortened before counters): 한(1), 두(2), 세(3), 네(4), 다섯(5), 여섯(6), 일곱(7), 여덟(8), 아홉(9), 열(10) Note: 하나→한, 둘→두, 셋→세, 넷→네 when placed before a counter. The counter 그루 comes right after the number. The noun can come before or after the number+counter, but before is more natural in conversation.

Real Examples

• 나무 한 그루를 심었어요. (namu han geurureur simeoteoyo.) — "I planted one tree." [한 = native 1] • 공원에 나무 백 그루가 있어요. (gongwone namu baek geuruga iteoyo.) — "There are 100 trees in the park." [백 = sino 100 (large numbers)]

Common Mistakes

❌ Using Sino-Korean numbers with 그루 ✅ Use native Korean numbers: 나무 한 그루를 심었어요. → 그루 always takes native Korean numbers. Mixing number systems is one of the most common counter mistakes. ❌ Saying the number without a counter (e.g., "사과 세") ✅ Always include the counter: 나무 한 그루를 심었어요. → Dropping the counter sounds incomplete in Korean, like saying "three of" without finishing the phrase in English.

Quick Tip

Start with the 5 most common counters: 개 (things), 명 (people), 마리 (animals), 잔 (cups), 병 (bottles). Once these are automatic, add 그루 to your toolkit. Practice counting things you see daily: "커피 두 잔", "사람 세 명". The more you use counters in real situations, the faster they become natural.

그루 = trees. Uses native Korean numbers.

Examples

나무 한 그루를 심었어요. — namu han geurureur simeoteoyo. — I planted one tree.

공원에 나무 백 그루가 있어요. — gongwone namu baek geuruga iteoyo. — There are 100 trees in the park.