---
title: "Help with a diagnosis for my thai con please. I use my own soil mix…"
description: "Help with a diagnosis for my thai con please. I use my own soil mix in all my plants and a water meter so I dont think I’ve been overwatering. she gets regular…"
url: "https://getplanta.com/community/lKxUkhzRR_aIJD7o1QvtwQ/A6vtH2UlTTWCiFK9rL43rK?language=ja"
community: "Pests, diseases and problems"
author: "Megan"
published: "2024-12-19T04:44:36.022143Z"
language: "en"
image: "https://images.getplanta.com/v1/resize/6nDUT5Dy0iJxQC4pBS0u73NZLBS9mF8NY5a6GZPia3A/7pwow2I9TACULZ1DLsbRHw.webp?size=large"
---

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# Help with a diagnosis for my thai con please. I use my own soil mix…

_Meganさんが2024-12-19に投稿しました_

Help with a diagnosis for my thai con please.

I use my own soil mix in all my plants and a water meter so I dont think I’ve been overwatering. she gets regular fertilizer/ silica and I use timed grow lights to supplement during the winter and an infrared heater to keep the room temp stable. The windows are sealed with plastic over the winter so there isnt any drafts. My humidity stays around 80% . I preventatively treat all my new plants with spinosad and use bonide systemic granules in all my plants. I did forget to close the curtains but i dont think theres been enough sunlight to burn the plants (Im in Maryland).

She has new leaf growth but out of no where these black spots are on three leaves. Im not sure what they could be or what I’m doing wrong here. If anyone might know, Id appreciate the help.

![3件中1件目の添付ファイル](https://images.getplanta.com/v1/resize/6nDUT5Dy0iJxQC4pBS0u73NZLBS9mF8NY5a6GZPia3A/7pwow2I9TACULZ1DLsbRHw.webp?size=large)

![3件中2件目の添付ファイル](https://images.getplanta.com/v1/resize/6nDUT5Dy0iJxQC4pBS0u73NZLBS9mF8NY5a6GZPia3A/qYabG_4uTV-j1E6Bbdg1qw.webp?size=large)

![3件中3件目の添付ファイル](https://images.getplanta.com/v1/resize/6nDUT5Dy0iJxQC4pBS0u73NZLBS9mF8NY5a6GZPia3A/Kc4EGJdvQfCA8NsbcRK1xA.webp?size=large)

## 6件のコメント

### 9sさんが2024-12-19にコメントしました

looks fungal to me. how’s the airflow? that’s pretty high humidity. i would make sure you have a fan somewhere around to help the air move a bit.

#### Meganさんが2024-12-19に返信しました

Okay, thank you! Ill try that

#### Meganさんが2024-12-19に返信しました

Is there an anti fungal you’d recommend? I have copper spray and arber fungicide but i dont know if theres anything better

#### 9sさんが2024-12-20に返信しました

you can spray with copper but it won’t reverse the damage - just prevent further spreading of the spores

### Wolfen 🐺さんが2024-12-19にコメントしました

Yea I'd say infection or thrips. The bigger dots make me think bacteria or fungal, but the tiny ones are similar to thrip damage.

### KJMさんが2024-12-21にコメントしました

I have a great reference for you. Go to monstera Thai constellation the ultimate care guide (and how not to kill them). It's very thorough and informative and it's put out by lovethatleaf.com. you won't regret taking the time to read it.

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