weird growth on top

[THE BEAR]

Some of my plants have got skinny leafs on top, its the newest growth on the plants, their curling at the top, i don't think this is normal?
They have not been feed any nutes yet and are on day 30, they seem to have slowed down in groing,

I've got deficencys going on with other plants now too, should i add the bio bizx boom tomorrow with their watering but flush first or can someone recommend what i should do next as i don't have a clue about nutrients and it scares the hell outa me, lol

@Mañ'O'Green can u help please

 

[THE BEAR]

Pics in bad light, but its very cold ATM,
Yellowing leafs at bottom of plant on some, rusty spotted brown dry leafs on bottom on one,, could be water splash i think tho, some purple stems,

Seems I've messed up some were, between fan left on too high and not using nutes, i hope i havnt done much damage

 

[Mañ'O'Green]

@The bear 88 Yeah something is going on. Cold? Don't panic we have time to fix this.

Please fill in this form: (copy and paste part is below, this first one tell what specifically to include)

-Problem: (brief description)
-Medium/grow method: soil; soilless-- coco, or peat based like Promix, etc. (please provide the actual product name); DWC, NFT, etc.
-Feed and supplements used: include brand, dosage/strength, frequency of feeding and watering (alone); method-- by hand, drippers, rercirc' or drain-to-waste,... N-P-K #'s too if you can!
-Water source: RO/DI; tap- dechlorinated-?..... EC or TDS reading; pH (don't bother with this on RO/DI, do bother with TDS/EC though to confirm it's working well enough)
-Strain and age
-Climate: night and day ambient T and RH%; res' temperatures; any extremes in T/RH% exposure
- Light used: HID, LED, COB, combo of,... wattage; light cycle hours (20/4, 18/6 , etc.); distance to tops....
-Additional info: PH in the root zone. How long have the plants been affected?...How fast did symptoms appear?... Anything else you think might be relevant..

--Pictures including WHOLE PLANT PICS, and troubled leaves.. use normal light or flash as other light sources ruin color rendering, critical for diagnostics! Turn off the grow lights.

✂ - - - - - - - - - - -
(copy and paste)-->

Problem:

Medium/grow method:

Feed: and supplements used:

water source:

PH in the root zone:

Strain/age:

light used:

Climate:

Additional info:

 

[THE BEAR]

Problem:
slow growth, skinny top new growth, curing new growth

Medium/grow method:
soil/perilite 70/30

Feed: and supplements used:
none

water source: tap water / decloronised

PH in the root zone:
no tester

Strain/age:
average 30 days

light used:
600 w HPS

Climate:
27© canopy. 22© soil level 20© floor beside pots, 26© centre tent, RH 45%

Additional info:
grown in soil from the local garden centre, granidol compost,

 

[JSH1973]

Don't flush if you haven't feed nutes yet, you will just end up with a classic over watering scenario.
Try a little bit of nutes for a few days and see if the curling corrects itself a little, personally I think they are just a bit temperamental at that early stage/age, if you looked at them a few hours later they could look almost normal.

 

[THE BEAR]

1 plant got purple stems and stalled growth, needs feed now too, was fimed over a week ago

 

[JSH1973]

I have plenty of purple stems around the grow, I don't think it is necessarily as bad thing, could be just the strain, someone more experienced can chime in on it but it hasn't panicked me

 

[THE BEAR]

Yellow from bottom up, was very droopy less than a week ago, feed bloom nutes, perking up again now

 

[THE BEAR]

Yellow from bottom up

 

[THE BEAR]

Different pics of different plants