desertbloom
Active Member
Hi
This is a hydroponic drip system under 12/12 HPS. Full indoor grow in an area with few to no insects. Inspection shows no infestation. The nutes being used are FloraNova Bloom, Cool Bloom and Floralicious + and 5 oz of 3% H2O2 is added daily to a 12 gallon reservour.
This problem has been getting worse over the past week. (see atachment) Most leaves have always shown a bit of a heat stress. Room temps range between 75 & 85 degrees. Humidity is less than 20%. Heat and humidity are the biggest challenge to contol.
These plants are in their 7th week of flowering. The pH has been relatively stable at around 6-6.5 sometimes registering as low as 5 and as high as 7.5 but pH is checked daily and drops and spikes are quickly adjusted.
PPM at this stage is stable at 1000 but has been as low as 700 and as high as 1450. PPM targets were established thru advice from a hydroponic equipment supplier. Information on PPM targets dependent on the week of flowering time or plant height has been hard to find.
The problem is that the mostly the upper leaves have been getting yellow speckles over the last week and the speckling is getting worse and effecting all plants. I tend to believe that the nute PPM is too high. Any advice on what the problem is and possible solutions would be appreciated.
Thanks
DB
This is a hydroponic drip system under 12/12 HPS. Full indoor grow in an area with few to no insects. Inspection shows no infestation. The nutes being used are FloraNova Bloom, Cool Bloom and Floralicious + and 5 oz of 3% H2O2 is added daily to a 12 gallon reservour.
This problem has been getting worse over the past week. (see atachment) Most leaves have always shown a bit of a heat stress. Room temps range between 75 & 85 degrees. Humidity is less than 20%. Heat and humidity are the biggest challenge to contol.
These plants are in their 7th week of flowering. The pH has been relatively stable at around 6-6.5 sometimes registering as low as 5 and as high as 7.5 but pH is checked daily and drops and spikes are quickly adjusted.
PPM at this stage is stable at 1000 but has been as low as 700 and as high as 1450. PPM targets were established thru advice from a hydroponic equipment supplier. Information on PPM targets dependent on the week of flowering time or plant height has been hard to find.
The problem is that the mostly the upper leaves have been getting yellow speckles over the last week and the speckling is getting worse and effecting all plants. I tend to believe that the nute PPM is too high. Any advice on what the problem is and possible solutions would be appreciated.
Thanks
DB
