Sir Cannabis
Member
Goal: care for mother plant and cloning
Medium: Rockwool
Strain: Amnesia Haze
technique: from clones
Week: not exact but, past 8 weeks minimum
Phase: vegetative
length plants: between 25 and 40cm
Water: Regular tap water
Watering: limited to the method watering from above with a hose.
Last watering: Few days ago (6 days)
Water temperature: steady 21+ max 23
Nutrients: A, B fluid component, magnesium, nitrogen,
PH: 5.8. EC: 1.0-1.1. Calibrated equipment correctly
Kindly inform me on the cause and advise how to cure. How would you handle this situation? I will update the post asap.
Here is a short chronological description to get the thread started:
- No flush or cleaning applied as of yet since 8 weeks
- Will test PH. I would appreciate your advise on the method of testing. I have a PH pen to test. I do not want to drain and collect the pot for fear of over watering issues. I could extract some rock wool from the top and use water to extract the mixture. Some algae on the top could effect to PH reading.
- Experienced some purple stems caused by slightly colder night time temperatures of 17-18 celsius. Stems are recovering from purple colouring since a week
- Heater failure approx. 2 weeks ago. Temp drop to 12 celcius. The drop in temp happened during sleep night time and was solved the next morning.
- Since 12 celsius heat drop noticed yellowing from nitrogen deficiency. Understandably for I had not given any nitrogen in this cycle. First nitrogen nutrient of this cycle was given 6 days ago. I split the nitrogen dose giving it during watering and consequently also spraying some of the dose on the leafs.
- The following days the green color of the leafs improved. Less yellowing.
- As seen on the pictures leaves are wilting. Meaning the issue is of long lasting nature (1 week).
- the wilting started with the bigger fan leaves below, but currently progressed to develop indiscriminately from bottom to slightly below the top.
My diagnose possibilities for you to understand my headspace:
cause 1: Perhaps a slight and developing phosphorus deficiency accompanied by calcium.
cause 2: Another possibility is under watering accompanied by nutrient lockout from the roots. Medium is rock wool. 6 days ago was my last 1/2 liter per pot watering.
Planned approach:
- test and correct PH in rock wool. Advise required for method of testing. Drain or sample mixed in water
- Split saturated plants from under watered plants.
- Give watering to the latter ( under watered plants ) only using PH 5.5 - 6.5 and EC 1.0. Hydro A, B and a modest amount of magnesium
Please advise according to attached images. Only a 2 of the 8 plants are affected as of yet
Medium: Rockwool
Strain: Amnesia Haze
technique: from clones
Week: not exact but, past 8 weeks minimum
Phase: vegetative
length plants: between 25 and 40cm
Water: Regular tap water
Watering: limited to the method watering from above with a hose.
Last watering: Few days ago (6 days)
Water temperature: steady 21+ max 23
Nutrients: A, B fluid component, magnesium, nitrogen,
PH: 5.8. EC: 1.0-1.1. Calibrated equipment correctly
Kindly inform me on the cause and advise how to cure. How would you handle this situation? I will update the post asap.
Here is a short chronological description to get the thread started:
- No flush or cleaning applied as of yet since 8 weeks
- Will test PH. I would appreciate your advise on the method of testing. I have a PH pen to test. I do not want to drain and collect the pot for fear of over watering issues. I could extract some rock wool from the top and use water to extract the mixture. Some algae on the top could effect to PH reading.
- Experienced some purple stems caused by slightly colder night time temperatures of 17-18 celsius. Stems are recovering from purple colouring since a week
- Heater failure approx. 2 weeks ago. Temp drop to 12 celcius. The drop in temp happened during sleep night time and was solved the next morning.
- Since 12 celsius heat drop noticed yellowing from nitrogen deficiency. Understandably for I had not given any nitrogen in this cycle. First nitrogen nutrient of this cycle was given 6 days ago. I split the nitrogen dose giving it during watering and consequently also spraying some of the dose on the leafs.
- The following days the green color of the leafs improved. Less yellowing.
- As seen on the pictures leaves are wilting. Meaning the issue is of long lasting nature (1 week).
- the wilting started with the bigger fan leaves below, but currently progressed to develop indiscriminately from bottom to slightly below the top.
My diagnose possibilities for you to understand my headspace:
cause 1: Perhaps a slight and developing phosphorus deficiency accompanied by calcium.
cause 2: Another possibility is under watering accompanied by nutrient lockout from the roots. Medium is rock wool. 6 days ago was my last 1/2 liter per pot watering.
Planned approach:
- test and correct PH in rock wool. Advise required for method of testing. Drain or sample mixed in water
- Split saturated plants from under watered plants.
- Give watering to the latter ( under watered plants ) only using PH 5.5 - 6.5 and EC 1.0. Hydro A, B and a modest amount of magnesium
Please advise according to attached images. Only a 2 of the 8 plants are affected as of yet
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