Mold on soil and bottom holes of pots

april20

april20

Member
Hey folks,

Got what seems like a pretty serious problem with mold here. It's not on the leaves (yet), it's on the soil.

Indoor grow - 12 plants
Just started the bloom cycle, 3 days in now.
daily watering, 1 Gallon water with nutrients per day between 12 plants.
every third day is only water w/o nutrients
12h light/12h dark
growing in soil with perlite

Temp @ 70F on average
Humidity @ 60% on average

Went to water the plants today and noticed that a white mold had covered the top of the soil of one of the plants.

I scraped the mold and top soil off the plant and threw that soil/mold mix away.

I inspected the other 11 plants and there were 10 little dots of mold between 3 of the other plants, the other 8 plants look clean. The spots of mold were typically on the soil near the the edge of the top of each pot.

Also, during inspection, I noticed that there is mold growing at the holes at the bottom of the pots on at least 4 of the plants. I've attached pictures of the mold growing at the bottom of these pots. :(


I've turned the oscillating fan on HIGH to be sure there's enough circulation to help prevent any more mold. I'm not going to water the plants for a day or two to be sure they're not getting too much water. I'm going to remove the mold from the bottom of the pots.

Has anybody else had this happen? I'm wondering what else I should do. Any recommendations? Thanks!
 

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nanskies

nanskies

Active Member
dude that sucks...are you watering at night...i think the humidity might be too high as well...thats a bad deal there
 
april20

april20

Member
Update: It turns out there was mold growing on the bottom holes of all but 2 or 3 of the plants. All the visible mold has been removed. Fan is on high and circulating lots of air.
 
S

strain stalker

New Member
....let your plants dry out until they wilt before you water them again. You shouldn't have to water your plants everyday.... Do this a few times, this will help out some. . I'd get me a dehumidifier asap....if you have one already, I'd get another one also....good luck.
 
april20

april20

Member
strain stalker said:
....let your plants dry out until they wilt before you water them again. You shouldn't have to water your plants everyday.... Do this a few times, this will help out some. . I'd get me a dehumidifier asap....if you have one already, I'd get another one also....good luck.
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Alright, I'll let them dry out.

What should the humidity be at? I thought 60% was a good range for beginning of the bloom cycle.

Since the discovery of mold, I've brought the humidity down to 50%.
 
april20

april20

Member
Update: Day 2 after my first post. There doesn't seem to be any mold yet. I'm keeping humidity below 50% and I haven't watered. I'll be watering with 3/4 of a gallon between 12 plants.
 
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