young plant issue

mwilliams2006 said:

Hi all. Would like some input on this one. Thanks in advance!

Problem: droopiness/ spots on older leaves

Medium/grow method: DWC

Feed and supplements used: Megacrop (4g/gal) + Cal/Mag (1 ml/gal) + Hydroguard (2ml/gal) = Total PPM 700; pH 5.6-6.0 - fairly steady at 5.8. pH pen calibrated weekly

water source: RO

Strain/age: FB Green Crack Auto - emerged 4/28 (16 days old)

light used: Kind xl300 18/6

Climate: 83 F (lights on) - 75 F (lights out); RH 40-55%

I am a novice and could be way off base but here are my thoughts:

I had suspected a root issue, but roots seem ok - they appear whiter than the photo and the same color as the larger plant in the same res which is doing ok. MC seems to slightly stain the roots. I cannot identify any specific nute def. She seemed to be doing well at this nute level up to 24 hours ago. It's a shared res so I may be limited on what I can do about that.

She was moved under this light 4 days ago but it doesn't look light related to me.

Pythium? Mg? Ca?

Pics:

Click to expand...

mwilliams2006 said:

Hi all. Would like some input on this one. Thanks in advance!

Problem: droopiness/ spots on older leaves
Medium/grow method: DWC
Feed and supplements used: Megacrop (4g/gal) + Cal/Mag (1 ml/gal) + Hydroguard (2ml/gal) = Total PPM 700; pH 5.6-6.0 - fairly steady at 5.8. pH pen calibrated weekly
water source: RO
Strain/age: FB Green Crack Auto - emerged 4/28 (16 days old)
light used: Kind xl300 18/6
Climate: 83 F (lights on) - 75 F (lights out); RH 40-55%

I am a novice and could be way off base but here are my thoughts:

I had suspected a root issue, but roots seem ok - they appear whiter than the photo and the same color as the larger plant in the same res which is doing ok. MC seems to slightly stain the roots. I cannot identify any specific nute def. She seemed to be doing well at this nute level up to 24 hours ago. It's a shared res so I may be limited on what I can do about that.

She was moved under this light 4 days ago but it doesn't look light related to me.
Pythium? Mg? Ca?
Pics:

Click to expand...

Bosgrower said:

I don't know which MegaCrop you're using ... the original 9-6-17 or the new version 5-12-26 but either way you're at least double the dose at this stage of development. Also, whose CaMg are you using? I love most of the Greenleaf Nutrients products, but their CalMag is N12-Ca11-Mg3.5 ... that's a lot of extra N. Greenleaf has a helpful feeding calculator on their site for all of their products. I know you're not there yet, but look at Sweet Candy and Bud Explosion as well.

The Kind XL300 draws 175w so unless you have right next to the top of the plants that shouldn't be an issue.

Can't really help you much with DWC specific stuff ... I'm a hempy bucket/coco grower, but I'd check the water temperature regularly.

Good luck

Click to expand...