Help! Dying dieffenbachia/Dumb Cane

Joined
Jan 23, 2022
Messages
6
Reaction score
2
Location
San Diego California
Hardiness Zone
10b
Country
United States
I’ve had my dieffenbachia for about 2 years now. It was always so happy until about 2 months ago when I noticed the leaves were more pale green vs. rich, dark green. I moved it a little further from the window which seemed to help (new growth looked happy and dark green). Suddenly the leaves were getting crispy, so I increased watering slightly, but it is still struggling.
I live in a place with very hard water. I do leave it out for 24 hours before watering but think this may not be enough. I also found these small black spots under 1-2 leaves - residue from bugs maybe?! Any help is appreciated! :)
 

Attachments

  • image.jpg
    image.jpg
    160.8 KB · Views: 14
  • image.jpg
    image.jpg
    137 KB · Views: 12
  • image.jpg
    image.jpg
    126.1 KB · Views: 18
Joined
Aug 10, 2021
Messages
4,224
Reaction score
1,488
Location
California
Country
United States
Greetings, welcome to the Forums.

Those black spots are Thrips (Thysanoptera). First wipe the leaves with warm water, but you will also likely need to use an insecticidal soap spray.

Also check the drainage on the pot. Soil should be damp, not saturated and it should be allowed to partly dry before the next irrigation.

For Dieffenbachia cultivars bright indirect light is ideal. Also if you do not fertilize your houseplants, begin to do so. Monthly during the growing season as you irrigate is an easy way to incorporate this into tour routine.

When the weather is warm, perhaps now in San Diego, consider setting your plants outside whenever possible. Many houseplants benefit from outdoor 'vacations', where airflow and relative humidity is greater.
 
Joined
Jan 23, 2022
Messages
6
Reaction score
2
Location
San Diego California
Hardiness Zone
10b
Country
United States
Greetings, welcome to the Forums.

Those black spots are Thrips (Thysanoptera). First wipe the leaves with warm water, but you will also likely need to use an insecticidal soap spray.

Also check the drainage on the pot. Soil should be damp, not saturated and it should be allowed to partly dry before the next irrigation.

For Dieffenbachia cultivars bright indirect light is ideal. Also if you do not fertilize your houseplants, begin to do so. Monthly during the growing season as you irrigate is an easy way to incorporate this into tour routine.

When the weather is warm, perhaps now in San Diego, consider setting your plants outside whenever possible. Many houseplants benefit from outdoor 'vacations', where airflow and relative humidity is greater.
Thank you so much! It seems to be doing better. Do you have a type of fertilizer you recommend for indoor plants?
 
Joined
Aug 10, 2021
Messages
4,224
Reaction score
1,488
Location
California
Country
United States
Any complete, general-purprose liquid fertilizer should do fine. Miracle-gro is the standard, but there are other fine brands as well.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Members online

Forum statistics

Threads
27,198
Messages
260,527
Members
13,731
Latest member
logodesignsexpert

Latest Threads

Top