What did you do wrong?
Most often, brown leaves are resulting from improper water and sunlight for the plant’s needs.
Like animals, plants are living things with specific needs.
The Spruce / Adriana Sanchez
But just as puppies are different from kittens, so too arecactidifferent fromficus plantsorspider plants.
Research your particular plant variety to see whether it will perk up with some additional spritzing.
This happens to many kinds oftropical plantsas they grow.
The Spruce / Krystal Slagle
Over time, the plant will form a bare stem.
However, in some cases, brown leaves are a sign ofcultural problems.
And be consistent in your care, as erratic watering and feeding can trigger leaf browning.
The Spruce / Krystal Slagle
Prune awaydying leaves, so the plant can focus its energy on healthy growth.
And move it up a container size if it has become root bound.
Why Are My Leaves Turning Brown?Utah State University Extension, 2019