Need help plz on my first grow, leaves are curling

Hi guys, I started my flowering period on my girl about an week ago, from 4 days some leaves are curling , i use bio grow and biobizz , an user told me is "need some bone and blood meal plus some cal/mag bro" but i want to have more opinions , if you want and have time please visit my thread https://www.rollitup.org/indoor-growing/502126-1-unknow-seed-100cfl-veg.html , just 2 pages to read

i use 250w hps light, temperature is around 22 C

here are some photos :View attachment 1998761View attachment 1998762View attachment 1998763View attachment 1998764View attachment 1998765View attachment 1998766View attachment 1998767View attachment 1998768View attachment 1998769View attachment 1998770View attachment 1998771View attachment 1998772View attachment 1998773

plants might be adjusting to light level. but all i see an over watered plant. like i just told another guy i started w/ plain miracle grow and a bottle of ionic and grew some killer out of bag weed. all those amendments are bullshit unless you have a real defined style of growing.(such as organics where particular ingredients are needed to create a micro-ecosystem in the soil; worm castings guano kelp extract ect.) if your the average grower hoping to get good results then just follow the instructions on any 1 single nutrient bottle at half strength every 2 weeks up to last 2 weeks of flowering. make sure you mark the date you put your baby into flower!

Could be a number of things:

How often do you water?
Do you let the soil dry out good prior to watering again?
Is the temp 22 degrees Celsius in the top of the canopy, or just somewhere near the plant?
Are you Ph-ing your water and oxygenating it for 24hrs prior to watering?
Are you using a flower nute with some N? I ask because they look a little on the pale/yellowish-green side.)
Is your Relative Humidity lower than 60%?
Are you ventilating your box with at least four air exchanges an hour? (if you are NOT supplementing with CO2)

If I had to guess based on the information you have provided and just looking at the pics, I would say over watering or your Relative Humidity is over 60%, and it could also be lack of fresh air thru your box or lack of N. Kick us some more details on the above questions an see if we can narrow it down.

how much air do you have on them?

SouthernSurfer :
here are the answers:
1. usually 0.5 Litre of water every 2 days but on my last watered i put 1 litre of water.
2.no i havent , is not totally dry ... just a bit wet not total dry .
3. 22 C indikate my termometer , is it between plant and the bulb.
4. no i dont have any PH test or smth i put water from the tap in the house and boil the water , and wait an hour to cool it down , add nutrients and watered. //// again the last time i didnt boil it
5. yes i USe biobizz bio grow 0.5 ml/0.5 Litre with NPK 4-3-6 + biobizz BLOOM 1 ml/0.5 with NPK 2-6-3
6. i dont know the humidity...
7. the plant is in a closet with the door half opened and the window open , constantly fresh air from outside is coming. (whent the light is ON) when i OFF the light the closet is closed, sigilated . thx all for you answers

and the leaves are rough /hard ...if it were dry

First of all, get yourself thermometer/hygrometer (you can find 'em on ebay for $10) second, they don't look too bad, just don't overfeed.

From what you say, it looks like overwatering and not ph'ing your water, and if you are fertilizing each time you overwater, you are probably overfertilizing too.

spike91 said:

SouthernSurfer :
here are the answers:
1. usually 0.5 Litre of water every 2 days but on my last watered i put 1 litre of water.
2.no i havent , is not totally dry ... just a bit wet not total dry .
3. 22 C indikate my termometer , is it between plant and the bulb.
4. no i dont have any PH test or smth i put water from the tap in the house and boil the water , and wait an hour to cool it down , add nutrients and watered. //// again the last time i didnt boil it
5. yes i USe biobizz bio grow 0.5 ml/0.5 Litre with NPK 4-3-6 + biobizz BLOOM 1 ml/0.5 with NPK 2-6-3
6. i dont know the humidity...
7. the plant is in a closet with the door half opened and the window open , constantly fresh air from outside is coming. (whent the light is ON) when i OFF the light the closet is closed, sigilated . thx all for you answers

Click to expand...

I would also say watering is the issue. I would space your watering to every 3+ days at the least. In 2 gallon pots (8.8 liters volume), with my relative humidity between 30-50%, I only have to water every 4 to 7 days. This depends greatly on the age/size of the plant (i.e. young plants get watered closer to day 7, older flowering plants get watered closer to day 4).

If you water frequently in small amounts the roots could start to rot, or root growth will slow (due to them not needing to spread out in search of water/nutes) and nutrient uptake efficientcy lessens. When I say let the soil dry, I mean at 3 inches (7.6 centimeters) of depth it should only be slightly moist. This can be determined by sticking your finger into the soil to that depth and feel for wetness and also look at your finger, when you pull it out, to see if soil fragments are stuck to your finger. If there is, or it feels wet, give it more time prior to watering again. You can also judge by how heavy the pot feels, dryer soil= light pot, wetter soil=heavier. I use both methods.

Also, when you water, 1 gallon of soil should generally get 0.20 gallons (5 to 1) of water when needed (or 4.4 litre pot gets 1 litre of water).

So I would just let the soil dry an extra day or two, get your self a cheap RH/Temp meter and a Ph meter like growmo23 said (Ph water, with or with out nutes to between 6.3 - 6.8 ). I use a cheap yellow digital Ph meter that I bought on ebay and it works very well. Make sure you are letting your water sit out to room temp and also to off gas any chlorine (if you have a local water system that uses "chlorline" or similar, letting it sit out will not help, only filtration will). Only add nutrients every other watering like sarita99 stated to give the plant time to use as much of the residual nutrients in the soil as possible, prior to adding more into the root mass. I only use .5 to .75 of the recommended dose that the nutriant manufacturure states on the product. And if you can, bring fresh air in during the dark period. This will help keep your humidity from building up and help to remove "stale" air.

Hope some of this helps out. Take care