Plant notes
How I Learned to Spot Root Rot Before It's Too Late
I killed three perfectly good pothos plants before I realized they weren't just 'thirsty' - they had root rot. It's embarrassing to admit, but I kept watering them because the leaves looked droopy, which only made things worse. Here's what I wish I'd known about identifying and treating root rot in my tiny flat where I can't exactly spread out and make a mess.
What Root Rot Actually Looks Like (And Smells Like)
The first real sign I learned to recognize was the smell. When I finally unpotted one of those dying pothos, the roots smelled like a swamp - musty and sour. Healthy roots are firm and white or tan, but rotted roots are brown or black and literally fall apart when you touch them. They're mushy, like overcooked pasta. The leaves will look wilted even when the soil is wet, and sometimes you'll see yellowing that starts at the bottom of the plant. I also noticed the pot felt heavier than usual because the waterlogged soil wasn't draining properly. Now I do the smell test if I'm suspicious - I stick my finger deep in the soil and smell it. Sounds weird, but it works.
Getting the Plant Out and Assessing the Damage
This is the messy part, and in my small flat I've learned to do this in the bathtub with newspaper laid down. I tip the pot and wiggle the plant out gently - sometimes the root ball just slides out because it's so soggy. Once it's out, I brush away the wet soil with my fingers to see what I'm working with. If more than half the roots are brown mush, honestly, the plant might not make it, but I still try. I look for any white or firm roots because those are the survivors. I killed my first attempt at saving a snake plant because I didn't remove enough of the bad roots - I was too timid about cutting. Now I know you have to be thorough, even if it means the plant looks nearly naked when you're done.
Cutting Away the Rot and Repotting
I use regular kitchen scissors that I've cleaned with rubbing alcohol - nothing fancy. I cut away every single brown or mushy root, even if it means removing three-quarters of the root system. Between each cut, I wipe the scissors with alcohol again so I don't spread the rot. Once I've removed all the bad bits, I let the plant sit on a towel for about an hour to dry out a bit. Then I repot in completely fresh, dry potting mix - never reuse the old soil. I go down a pot size because there are fewer roots now, and I don't water it for at least three or four days. This waiting period was hard for me to accept because I'm an anxious plant parent, but watering immediately just invites the rot back. The plant might look sad for a couple weeks, but if you caught it in time, new white roots will eventually grow.
What I Changed to Prevent It Happening Again
Root rot kept happening to me because I was watering on a schedule instead of checking if plants actually needed it. Now I stick my finger two inches down into the soil - if it's damp, I wait. I also drilled extra drainage holes in some of my plastic pots using a heated screwdriver (carefully, with the window open). My flat doesn't get tons of light, which means plants use water more slowly, so I had to accept that my watering frequency would be different from what I read online. I also stopped using saucers that hold water under the pots, or if I do use them, I empty them fifteen minutes after watering. The biggest change was repotting store-bought plants right away - they often come in dense, peat-heavy soil that stays wet forever. Switching to a chunkier mix with perlite made a huge difference for my chronic overwatering habits.
Questions people ask me
Can a plant survive if all the roots are rotted?
If literally every root is mush, it's very unlikely, but you can try water propagation if there are any healthy stems or leaves left. I've had success cutting above the rot line and rooting the top portion in water like a cutting. It's basically starting over, but at least you save the plant's growth. I did this with a philodendron and it worked, though it took about six weeks to grow new roots.
How do I know if it's root rot or just underwatering?
This confused me for months. The trick is to check the soil moisture. If the leaves are wilting and the soil is wet or even slightly damp, it's likely rot. If the soil is bone dry and pulls away from the sides of the pot, it's underwatering. Also, underwatered plants perk up within hours of watering, but root rot plants stay droopy or get worse. When in doubt, unpot and look - I know it seems drastic, but it's the only way to be sure.
Do I need to use fungicide or hydrogen peroxide on the roots?
Honestly, I've saved plants both ways - with and without any treatment. Some people swear by diluted hydrogen peroxide rinses, and I've tried it, but I'm not convinced it made a difference compared to just thoroughly cutting away all the rot and using fresh dry soil. I think the key is really just removing every bit of damaged root and not overwatering after repotting. If you want to try peroxide, people usually do a solution of one part 3% peroxide to two parts water, but I've had equal success just skipping this step entirely.