Get Help for Cannabis Plants Problems as Quickly as Possible!

[Elias2107]

I was using ph- but I will take your advice and keep it on the low with nutrients from now on. I hope it’s not to late for them and that they will still be able to recover. I’ll update if any further problems show up. This advice has been great, thank you allot! 👍

[AGH]

Hello Elias2107!

Glad to see that you're growing! Is this your first grow or have you been growing a while?

Taking a look at your pics and reading your post, it looks like your little seedlings are suffering from what many new growers to - giving their plants too much love!

When cannabis plants are seedlings, they're very tender and fragile (I've never had a kid, but I imagine that's what babies are like?) and while they are resilient thanks to evolution, they can suffer from too much attention and care.

Seedlings are extremely special in that they initially have all the food and nutrients that they need to get started so no nutrients are needed. So if you're giving them any nutrients, that can probably stop for now. They're also sensitive to chemicals so if you're adding any pH-up or -down, you might want to cut back on that as well.

It also looks like your rapid rooters are extremely wet. While water is essential to plant growth, when they are seedlings, their roots don't really have the capability of absorbing much of it. When they first pop, seedlings actually take in more water from their leaves than their roots. If you're thinking, "Gee, maybe that's why seedlings like higher humidity than adult plants?" you're absolutely correct! Also, when seedlings are overwatered, it actually suffocates the roots causing all sorts of problems. Roots need oxygen/air as much as they need water.

Your little seedlings are looking pretty rough, but by going a little more 'hands off' you might be able to salvage them. My suggestions:
- Stop adding nutrients for now until they're bigger
- Stop watering for at least a few days.
- When you do start watering, give them VERY LITTLE (when my seedlings are that big, they just get misted using a sprayer. Once they're growing strong, I start doing about 1 cup (about 250mL) every 2-3 days)
- Also when you water little babies like that, try watering in a circle an inch or two (3-6cm) away from the base of the stem. This helps keep the medium wet without drowning the developing roots.
- And in general, you want your temps to be between 68-77F and humidity 65%-70% during the seedling phase. However, it appears that the watering issue is more prevalent than your environment at the moment.

Good luck, keep us posted, and remember that (usually) less is more with cannabis!

[Elias2107]

I put on the lid again but opened a few holes at the top so there is no to high humidity. Also started giving plants lower EC because they are not taking it so well I think. New EC is around 0.5

[Elias2107]

I give these plants (gorilla cookies fast flowering) EC 1 ph 6.2 with 2,6 ml canna vega, 4ml rhizotonic per liter. Temperatures are around 20 Celsius but can sometimes go down to 15 degrees Celsius. I have had them in the open because I thought the stems were real weak because there is no ai circulation but now put it back on. I hope I can get a tiny pc fan soon to fix this problem. Any other suggestions?

[Rwise]

It will help to burn all remaining roots, stems, etc.. As you have found borers can winter in them.

[SoOrbudgal]

Terrible but fixable. I would start by placing your pots ( i only grow in 15gal outdoors) up on blocks not on the ground and away from bushes or trees if possible. Do not reuse the soil probley eggs in it so destroy soil start fresh. I've not had root borers but do get moth catipillars mid to late summer that eat the buds. I do not know what else to say on pre treating if it's even possible with that type of " maggot " .

[cameron5592]

Help! I’ve been dealing with these root borers in maine for the past 2 summers now, I just went out today to clean out my pots from last grow and found another one still alive in the stems after months of winter, I’ve tried everything to get rid of them but nothing seems to work, wondering if anyone has any advice or if anyone else is having this same problem

[cameron5592]

Help! I’ve been dealing with these root borers in maine for the past 2 summers now, I just went out today to clean out my pots from last grow and found another one still alive in the stems after months of winter, I’ve tried everything to get rid of them but nothing seems to work, wondering if anyone has any advice or if anyone else is having this same problem

[Puglover1]

Elias2107 In your first pic the soil looks kind of compact. Did you use enough perlite ratio when mixing it?

[Bluey]

Any idea of the pH at the roots?

[Puglover1]

Other plants/strains are OK?

[ChubbNugg]

check miracle grow soil for paraquat. some coulda leaked in.

[Going2fast]

I let her dry out good then watered her with half strength bloom nutes 0.4-5-3 and water pH at 6.5 and moved lights up. Monitoring

[Blowdout2269]

Think ya got it figured out?
If this edge yellowing is mostly towards the top of the plant, I'd say that your ur correct assuming potassium deficiency.
What's the treatment plan?
Sorry about the late response. I always forget to check this topic, lol.

[Elias2107]

I use dirt to grow in mixed with perlite to keep airy. I also feed the plant sensi cal mag extra so I dont think it is a calcium deficiency however could be the opposite since add more of it compared to the other nutrients. I use a fan to keep the air moving but dont aim it on the plant. I wanted to thin out earlier but it is an autoflower and it was to late when it started flowering. Read somewhere that that decreases yield.