Why orchids grow on tree trunks

Imagine the jungle is like a big green roof. The tall trees have lots of leaves that make a thick cover, so the ground is very dark.

1. The jungle roof blocks the sun.

   Because there are so many big leaves up high, little plants on the ground do not get enough sunshine to grow well.

2. Orchids climb up the trees to find light.

   Orchids grow on the tree trunks and branches where the leaves are not so thick. Up there they can catch more sunlight, like standing on a chair to see better.

3. They are called epiphytes.

   That big word means the orchid lives on the tree but does not take food from the tree. It just uses the tree like a ladder or a house.

4. How orchids stay on trees.

   Their roots cling to the bark like Velcro. The roots hold on tight so the orchid doesn't fall.

5. Where they get water and food.

   Rain, morning mist, and bits of leaves give them water and tiny bits of food. Some orchids also get tiny nutrients from dust and fallen bits around their roots.

6. They do not hurt the tree.

   Orchids do not make the tree sick. They only use the tree to get up where the light is.

Try this little activity: pretend you are an orchid. Stand on the floor (the dark ground) — it's hard to see. Now climb up on a chair (the tree). You can see and feel the light better!

That is why orchids grow on tree trunks in thick jungles: to reach the sunshine.