thrash4ever
Well-Known Member
Hello!
Yesterday I started the lengthy (80-90 days) flowering process of my five feminised Utopia Haze (Barney's Farm) plants, after a month of vegetative growth.
Substrates:
- BioBizz Light-Mix
- BioBizz nutrients: Grow, Bloom, and Top Max
- Canna trace elements
Equipment:
- 250W High Pressure Sodium dual-spectrum bulb with standard reflector and ballast
- Rhino carbon filter (size:100x300, maximum: 300m3/hour)
- Rvk 100E2-A1 fan, standard ducting
- Black/white mylar sheeting throughout; the length of the chamber has ultra reflective (mirror) mylar
- 20x20cm 5.7 litre pots
- Long Garland tray
- Fan for circulation
- Cheeky little spray bottle for misting!
- Standard digital thermometer and hygrometer
- Analogue timer and surge protector
This is my first concerted effort to grow indoors and would be happy with a 125g-ish yield (250W divided by two). I performed a longer-than-usual vegetative cycle to make sure the plants were comfortable in the soil and finalised my set up (only later buying the carbon filter, etc.). I've been using the nutrient range for about ten days and since then the plants have shot up, initially using just the Grow formula (per litre), but have now moved onto adding the whole range since flowering has commenced.
However, there has been some noticeable negative effects (since nutrients have been added to watering) and I have my suspicions. Firstly, some of leaves of the top tier of the plants are doing "the claw," curling down and shrivelling at the tips. This is most likely not from over-watering, but from pH imbalance and resulting nutrient lockout, less likely nutrient burn, and plausibly heat/low humidity stress (plants are healthy distance from the bulb, roughly 50cm).
Some leaves are also displaying necrotic/deficient tendencies with patchy brown spots on the leaves. Also, a couple of the plants are displaying brightening/yellowing of the perimeter of the leaves.
- Have a look and let me know what you think, please.
I hope this is not lock-out from pH imbalance. I have no way to test the pH of the soil (can purchase kits or meters if required), but have been told on numerous occasions that with organic mediums pH does not need monitoring as the soil has sufficient built-in buffers, hence it is recommended to feed with every water.
I am fortunate to live in an area where the water is luxuriously soft (pH 6 to 6.5), also I use a filter on the tap water so any nasties are taken out. Me and my girls drink the same water
I will be giving updates so stay tuned. Any tips are appreciated, and thanks for reading.










Yesterday I started the lengthy (80-90 days) flowering process of my five feminised Utopia Haze (Barney's Farm) plants, after a month of vegetative growth.
Substrates:
- BioBizz Light-Mix
- BioBizz nutrients: Grow, Bloom, and Top Max
- Canna trace elements
Equipment:
- 250W High Pressure Sodium dual-spectrum bulb with standard reflector and ballast
- Rhino carbon filter (size:100x300, maximum: 300m3/hour)
- Rvk 100E2-A1 fan, standard ducting
- Black/white mylar sheeting throughout; the length of the chamber has ultra reflective (mirror) mylar
- 20x20cm 5.7 litre pots
- Long Garland tray
- Fan for circulation
- Cheeky little spray bottle for misting!
- Standard digital thermometer and hygrometer
- Analogue timer and surge protector
This is my first concerted effort to grow indoors and would be happy with a 125g-ish yield (250W divided by two). I performed a longer-than-usual vegetative cycle to make sure the plants were comfortable in the soil and finalised my set up (only later buying the carbon filter, etc.). I've been using the nutrient range for about ten days and since then the plants have shot up, initially using just the Grow formula (per litre), but have now moved onto adding the whole range since flowering has commenced.
However, there has been some noticeable negative effects (since nutrients have been added to watering) and I have my suspicions. Firstly, some of leaves of the top tier of the plants are doing "the claw," curling down and shrivelling at the tips. This is most likely not from over-watering, but from pH imbalance and resulting nutrient lockout, less likely nutrient burn, and plausibly heat/low humidity stress (plants are healthy distance from the bulb, roughly 50cm).
Some leaves are also displaying necrotic/deficient tendencies with patchy brown spots on the leaves. Also, a couple of the plants are displaying brightening/yellowing of the perimeter of the leaves.
- Have a look and let me know what you think, please.
I hope this is not lock-out from pH imbalance. I have no way to test the pH of the soil (can purchase kits or meters if required), but have been told on numerous occasions that with organic mediums pH does not need monitoring as the soil has sufficient built-in buffers, hence it is recommended to feed with every water.
I am fortunate to live in an area where the water is luxuriously soft (pH 6 to 6.5), also I use a filter on the tap water so any nasties are taken out. Me and my girls drink the same water

I will be giving updates so stay tuned. Any tips are appreciated, and thanks for reading.









