They look ok to me. White spots on soil indicates mold, which indicates overwatering.

What medium are they in? How much and often do you water them? Do you feed them? Whats their environment like? Do you have a fan blowing in their area? : )

Over watering/soil too wet.

For marijuana seedlings, it’s crucial to get the watering process just right. After planting, water gently to settle the soil, making sure it’s moist but not soaked. Avoid overwatering as seedlings have delicate roots and are prone to rot in overly wet soil. Water when the top inch of the soil feels dry, and be gentle with a watering can or spray bottle to prevent disturbing the plant. Make sure the water’s pH is between 6.0 and 7.0, ideally around 6.5, and let tap water sit for 24 hours to avoid chlorine. Signs of overwatering include yellowing or wilting leaves, while underwatering shows as dry, crispy leaves. Keep humidity around 60-70% to help with water retention, and adjust your watering schedule as the seedlings mature.

Yes, white spots on the soil can sometimes indicate overwatering, but more commonly, they are a sign of salt buildup from nutrients or minerals in the water. When plants are overwatered, the soil may stay wet for extended periods, which can cause salts from fertilizers or minerals in the water to accumulate at the surface as the water evaporates.

If you're looking for tips, I recommend using peat pots instead of plastic or fabric when transplanting. I've overwatered my plants more than once, but making these changes has helped prevent it from happening again. Watering is definitely the trickiest part of using soil until you get the hang of it.


Best of luck!

@Ganjafiend420

Thanks for your detailed response dude. The white spots in my opinion are salt build up. I believe I have over watered them.

@BearWater
They are in coco.
I have introduced canna start and canna rhizotonic.
I usually water them as they require. This is usually a day and half I'd guess.
I think the amount I feed them is the issue here.
Furthermore the temperature is in between 26c - 29c however humidity has been an issue and can drop significantly to around 20% mark. I have introduced a humidifier to increase humidity and now it sits at around 60-80%. I have had an oscillating fan in there from early on to help create stronger base.

I will try to cut back on the amount of watering I do. Furthermore I will only water for now rather that the canna start and rhizotonic.

All advice is greatly appreciated

Novicegrower91

coco is inert you need to feed them with low ec-ppm so i wouldn't stop the cannastart. might even be to low ppm and ec for coco.

canna shcedule for coco doesn't use canna start but directly coco a and b at lower dose from start