First Grow - Plant looking sick

Hi all,

First post for me. Just wondering if anybody out there has any ideas on how to improve a plant of mine. I had 3 seeds of Kosher Kush, germed them all in water for 24 hours and then popped them in the soil, plagron lightmix with added perlite. Unfortunately, due to unforeseen circumstances, I lost power for about 18 hours just after they popped and the temp would have dropped to about 15C.

However, 2 survived and and seemed fine to start with. They are about 2 weeks old now and have their 2nd set of true leaves. One of the plants looks quite yellow and seems slightly poorly developed. I understand that this may be due to a N deficiancy. I fed them for the first time 2 days ago and they shot up the day after. Watering as dry, usually 2 days.

I am using biobizz nutes. Grow,Root Juice and Alg-a-Mic at the moment. They seem to love it. 400W light. Temps 21C - 24C. Humidity 32% - 40%.

Any and all help appreciated and thanks for all the help I have received already from everybody on this site



Pic on the left is the plant looking yellow, on the right is the good looking plant. Sorry for the poor quality pics.

Just as a general rule about watering, you never want them to get dried out, you still want maybe 10-20% water in the pot every time you re water, they tend to get more stressed that way, and they could absorb more nutrients than they should if they're starving... The yellow plant looks N deficient to me since they're is no burning out other colors I can see... I can also see some curling on one of the leaves which is from too much heat /not enough water

Hey Kume, thanks for the reply. I check the plants every day and they never get too dry as far as I know. I check with my finger and feel the weight. Also the light is about 18" away from them with plenty of airflow over them so don't think it's the heat. Could anything else cause this? The first set of true leaves on the poor plant also had slight deformities as you can see at the back left of it in the pic. Not sure if this holds any significance.

I can't feed for another 2 days as I watered today with some Alg-a-Mic added to see if that helps. Should I just add some more Grow nute next time and see if that helps?

Thanks again for the reply

The curved leaf structure is not what you want. Often this is associated with over-watering. I would put a fan near them to get some indirect air movement if you haven't already.

Fan blowing over them 24/7 Bugeye. Might be over watering, was a little over eager the first few days but not too much Thanks for the reply

Yeah its weird, they are curling down which is a sign of over water... The leaves droop, too little water they curl up, and too much heat can cause the edges to curl up...But it sounds like you water enough, what I like to do is hang a thermometer /hygrometer from my lights touching the top of the plants so I know exactly how hot and humid they are, 18" should be fine, but I'd Check the temp at the top of the plants to be safe, but it seems like there are a few issues, the plants should be healed by now from lack of light, it stunts them and isn't good at all, but 2 weeks after should be long enough to recover

Ya will try and hold off a bit more on the watering. Have the humidity/temp meter sensor hanging right down at their level, just out of frame of the pic of the both. Hand feels fine when I hold it just at the level of the plants. Had some very good growth this week after their first feeding so might add a bit more Grow and see how things go. Things are looking better but still with the yellow on the other plant and leaves are much skinnier on the new growth.

Thanks for the replies.

alright...sounds like youre doing good then bro...that might just be old and healing, maybe youll see a difference in the next week? and youve gotta think most if not all of those leaves will be gone by the time you start budding anyways and the if you are growing indica, the bottom leaves will be very fat,..and the ones above it will get a little thinner but stay fat with few blades...sativa is always skinny and has lots of blades...indica is 3-7 and sativa is 7-11 blades on each leaf

A new problem seems to have arisen with the sick plant. Brown dead spots are appearing on the lower leaves. Have had a look and can't seem to narrow it down any.

They were fed on Saturday again and did grow some more. I upped the dose of the biogrow and root juice used.

Any and all help appreciated

Wat kind of soil are u using?

Plagron Lightmix with added perlite

Could it be a Ca deficiency?

Anyone? Getting a little worried about this plant and don't want to lose it

It's from heat stress, you can see the edges curling up, you're burning them

How strong is the nute mix you are giving them, do you know the ppm? There is very little nutrient in a lightmix soil so you will need to feed them more than a plant with richer soil. I would suspect a cal/mag deficiency from the spotting. I am not seeing heat stress but that should be easy to monitor with a thermometer at canopy level. The stretch between nodes suggests your lights may be too far away.

leave em dry about a little, they look OVER watered to me

Hey thanks for the replies. I don't think its heat stress as the temps are always less thab 25C and that's at canopy level according to the thermometer. Lowered the light today as I thought the same about the internodes.

I have been using biogrow and root juice from biobizz. Last feeding on sat and there was 2ml/L for each. Getting about the same strength alg-a-mic when watered. Watering every 2nd day or when they look thirsty. Think the need more nutes?

I will be potting up at the end of the week to a mix of 25% light mix, 25% batmix, 25% worm castings and 25% perlite. Hope this helps them a bit.

Also I found some black on the underside of a lower leaf of the healthier looking plant. Will upload pics later.

Thanks for all the help so far guys. More needed unfortunately

^Sorry, what is batmix? Hope you do not mean guano.

Plagron batmix. Soil with added bat guana ya. Why wats so bad? Not much and adds a little P and K. Thought they were needed for veg too but in smaller amounts?

No that's fine. It would be too high a ratio if straight guano. Sounds good.