Soil Runoff dangerously Low in first week of Flowering!

[ksmirov]

What type of medium; soil or hydro? Soil
What brand and type of soil? FFOF
Indoors or outdoors? Indoor Closet
What strain? White Widow and Blue Cheese
How old are the plants? 5 days into Flowering
What type of lights and how many watts? 600W HPS aircooled
How far from the lights? 14 Inches
What is your watering frequency and source of water? 3-4 days
What, how much and when was it fed? NPK? 1/2 Strength of Big Bloom and Grow Big, FF Open Sesame, 3ml CalMag, and 1 tbsp of Molasses
What is the medium/runoff pH and PPM if in hydro? 5.0
What are the temps and humidity in the room? 81-84F and 35-45% RH
What size pots? 5 gallon Smart Pots
Any bugs? Look real close. Not that I see
Any other pertinent info? Flushed a week before going into flowering and have been doing pretty well afterwards.


Hey guys, So I am day 8 of flowering with 3 plants and decided to test the Soil runoff. I watered it with no nutes and PH'd to 6.5

After a while the Soil runoff came out to 5.0 for all three plants. Last week it was 4.0 but I top dressed it with 4 tablespoons of dolomite lime for each pot.

Is there any suggestions on how I can get the PH of the soil back up? I know you can flush it but Im trying to see if theres any other way before resorting to flushing.

 

[Yngwie]

Your pH is too low. But plants look healthy, doesnt look like a plant with 5.0 pH.
Soil readings fluctuate. Its a good idea to take a few readings.

You do have Mg def. and youll see P def soon at this pH.
Your wilted leaves look like the plants getting rid of leaves under the canopy. I wouldnt worry too much about those.

Solutions...fix soil pH. Easier said than done.

Off the top of my head, you could

- pH adjust feeds and flush with neutralish 6.8ish
- top dress with some organics, worm castings, lime or other alkali amendments
- potassium humate (supplies humic acids and is a very resillient alkali)
- transplant into bigger, or root trim into new pH corrected soil (1st week of flower is still early)