---
title: "I just bought this corn plant from Costco a few days ago. Some of the…"
description: "I just bought this corn plant from Costco a few days ago. Some of the leaves had some dark edges (not crispy though) and also some dark spots edged in yellow.…"
url: "https://getplanta.com/community/lKxUkhzRR_aIJD7o1QvtwQ/ujdbQDjQGA3tvZf6WLiHL3"
community: "Pests, diseases and problems"
author: "Watts"
published: "2026-02-24T23:06:54.212911Z"
language: "en"
image: "https://images.getplanta.com/v1/resize/hUih24AuH_hlb0TzgQw921jsYfepiJmMVAvA--Tuzvw/mOHW-EpCR9GCzI2kSbYcMQ.webp?size=large"
---

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# I just bought this corn plant from Costco a few days ago. Some of the…

_Posted by Watts on 2026-02-24_

I just bought this corn plant from Costco a few days ago. Some of the leaves had some dark edges (not crispy though) and also some dark spots edged in yellow. I thought maybe it was due to transporting from the nursery and in my car, but now I’m worried it could be a fungus. I used planta diagnose app and said it was just maybe overwatering (I have not watered yet). Can anyone tell me if I have a fungus problem? If it is fungus I want to return or try to cut off the affected leaves right away.

![Attachment 1 of 3](https://images.getplanta.com/v1/resize/hUih24AuH_hlb0TzgQw921jsYfepiJmMVAvA--Tuzvw/mOHW-EpCR9GCzI2kSbYcMQ.webp?size=large)

![Attachment 2 of 3](https://images.getplanta.com/v1/resize/hUih24AuH_hlb0TzgQw921jsYfepiJmMVAvA--Tuzvw/TRJYN314Q1-LMXupVF65tg.webp?size=large)

![Attachment 3 of 3](https://images.getplanta.com/v1/resize/hUih24AuH_hlb0TzgQw921jsYfepiJmMVAvA--Tuzvw/PGIME339Qpu9DMuw5sJd1A.webp?size=large)

## 2 comments

### Cloudyskyy72 commented on 2026-02-25

Can’t tell if it’s fungus or bugs, but I would guess overwatering from Costco. I have a corn plant and it gets brown edges when I use tap water.

#### Watts replied on 2026-02-25

I have heard that they are sensitive to the fluorides and chemicals in tap water. I’m going to try to use distilled and rainwater when I can, but I think I’ll let it dry out just a bit since soil does feel wet. I’m going to hope it’s just overwatered. Thank you for the answer!

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