Ppm

Guest · May 23, 2012

I've been PH testing from the beginnning but I was told that it's not really necessary to test PPM in soil. Now that I'm recirculating the water a little bit, I think it would be a smart idea to start.
I figure it's probably pretty easy to read a meter. I just don't know the standard numbers. A friend of mine casually said he feeds at 1400 the week before he flushes.

What should the numbers be to build up to that including Veg time? Not looking for exact, just something I can ballpark. I was guessing something like this.

PPM
Veg
Week 1 - Probably just water
2 - "
3 - 800
4 - 900

Flower
1 - 1000
2 - 1000
3 - 1100
4 - 1200
5 - 1300
6 - 1400
7 - 1400
8 - Flush

Guest · May 23, 2012

This is what I was looking for!

seeds4thebirds said:

I contacted Advanced Nutrients to ask:

Here is their reply:

The 100% Organic medium bloom feeding schedule is a good place to start.

Advanced Nutrients' Nutrient Calculator - Analyze Soil Chemistry and Plant Nutrient Levels for Your Hydroponic or Indoor Garden.

Add to the reservoir the products that you have that are listed above, if you are using products that are not listed above apply at the rate suggested on the bottle.

In soil adjust the final pH of the solution to 6.3.

The amounts suggested to use are the amounts to feed for the whole week, if you want to feed more than once per week, divide the amount for the whole week by the number of feedings that you want to give your plants, give the plant just plain pH adjusted water when not feeding nutrients. (Ideally the pots are dry every 2 - 3 days)

I am including a general guide to feeding below.

Feeding Guideline

Don’t start feeding nutrients to rooting clones or seedlings such as the 2 part Sensi A & B (Grow) until they develop 3 or 4 sets of new/true leaves.

Until they develop 3 or 4 sets of new (clones)/true (seedlings) leaves feed them only water. You can foliar spray them with Jumpstart, use application rate suggested on the bottle or 1/4 strength B-52 (1 mL/liter) until then. You can also add 1/4 strength applications of Piranha, Tarantula and Voodoo Juice, to the water that you will use in the root zone.

Clones seedlings need high levels of moisture in the medium
(80% -85% is good 100% is too much)

The also like a warmer environment in the root zone 70 F – 80 F.

Entering the Vegetative stage, Use the Rooted Clones / Seedlings schedule in the nutrient calculator for the first two weeks of feeding)

Week 1

At 3 or 4 sets of new leaves mix nutrient solution at 300 ppm

Week 2

Mix nutrient solution at 600 ppm

Switch to Vegetative Stage feeding schedule if you are going to vegetate the plants longer than two weeks, the calculator goes up to another 8 weeks (you don’t need to veg the whole 8 weeks).

Week 3 is Week 1 on the vegetative chart

Mix nutrient solution at 600 - 900 ppm depending on size

Week 4

Mix nutrient solution at 900 -1200 ppm depending on size

Follow chart for additional weeks as required

When entering the Bloom Stage follow the medium feeding strength. (If growing indoors the bloom stage starts when the lights are switched to twelve hours of darkness and twelve hour of light).

Week 1- mix nutrient solution including supplements at 1000 ppm

Week 2 - mix nutrient solution including supplements at 1200 ppm

Week 3- mix nutrient solution including supplements at 1400 ppm

Week 4- mix nutrient solution including supplements at 1600 ppm

Week 5- mix nutrient solution including supplements at 1400 ppm

Week 6- mix nutrient solution including supplements at 1200 ppm

Week 7- Flush

The nutrient calculator is set for a 7 week strain; it can be customized for plants that require more than 7 weeks to complete their flower stage. Just click add a week.

The amounts suggested in the nutrient calculator are the total nutrient to feed the plant for a whole week, not the amount to give them per feeding.

If you want to give your plants nutrient solution more than once per week, divide the amount (total ppm) for the week by the number of feedings that you want to give them to calculate the ppm per feeding. A light cycle of plain ph adjusted water prior to commencing a new week’s feeding schedule will help prevent lock out conditions.

Plants may increase their over all size up to 2/3, during the bloom stage, for this reason the feeding schedules in the calculator increases the strength of the nutrient solution every week, reaching the highest concentration on the fourth week of bloom.

If plant needs longer than 6 weeks of feeding (7 week strain, the 7Th week is a flush week), repeat week 4 for each extra week.

Always reduce the amount that you feed your plants during the last two weeks of feeding.

Overfeeding

If the very tip of the leaves gets yellow it is an early sign of overfeeding. Reduce the solution strength slightly (100 – 150 ppm), if not increase slightly.

Deficiencies

If the margins or any other part of the leaves yellows off it is a possible sign of deficiencies. Check pH in medium and reservoir, if the pH is off from the ideal levels look out conditions may develop. At first symptom of a deficiency apply rule # 1 (When in doubt flush them out).
If growing in a medium that takes some time to dry up, allow the medium to dry and feeding them plain pH adjusted water when they are ready. If growing in a re circulating system, find a way to give them only pH adjusted water for the length of a light cycle, a second reservoir just for water may be a simple solution, then it is just a matter of moving the pump over, maintain the regular water pump cycle during the flush.

pH conditions in medium

In Soil/Soiless (Soil or Soiless mixtures that may also contain peat moss but not Coco Coir) adjust the pH to 6.3

In Hydro (It includes products such as Rockwool, Hydroton Rock, and Lava Rock) adjust to 5.6

In Coco Coir adjust the ph to 5.8 – 6.0. You may want to supplement with SensiCal when growing in coco with a base nutrient that in not specific to growing in coco

Root damage

Another possibility is damage in the root zone, check for the possibility of root rot, or insect larvae as potential causes for root deterioration, brown, mushy, smelly roots are a good indicator of root damage. Hydrogen peroxide is an efficient way to destroy root rot causing bacteria.

Mixing instructions

If using the base nutrient stand alone, mix nutrients according to instructions on the bottle.

If also using supplements follow feeding schedule in the nutrient calculator.

Advanced Nutrients' Nutrient Calculator - Analyze Soil Chemistry and Plant Nutrient Levels for Your Hydroponic or Indoor Garden.

Measurements:

1 gallon = 4 liters (quarts)

1 tsp (teaspoon) = 5 mL
1/2 tsp (teaspoon) = 2.5 mL
1/4 tsp (teaspoon) = 1.25 mL

1 tbsp (tablespoon) = 3 tsp (teaspoon) = 15 mL

I hope that this is the answer that you are looking for. If you have further questions please contact us via e-mail or by calling our tech support toll free line at 1 800 640 9605.
Click to expand...

PlantEngineer · May 28, 2012

don't trust the feed amount recommendations. start at 1/4 strength and let the plants tell you if thats good or not. Adjust from there

fwiw, I never feed over 800-850 ppm (but my plants never exceed 7', bigger plants need more IMO). You check the feed before going in, not the runoff, runoff is for ph. You have all kinds of crap in the runoff , its not a true reading of how much "food" is in the soil.

SCMC · May 30, 2012

PPM is a conversion from EC. Some meters use a 0.7 conversion. Others use a o.5 conversion. The different conversion rates can create confusion and problems between one grow room and another depending on the meter used. Anyone who speaks in terms of ppm does not understand this.

The only thing we should talk about online is the EC. This is standardized and is not a conversion. My 1.0ec is your 1.0 EC and that is important when trying to suggest appropriate feeding levels.

I start with a 0.6 EC at the beginning of veg, around the 3rd or 4th leaf set. I increase the EC with the growth, slowly at first and more rapidly as the plant grows faster later in veg up to a 1.6 EC. During flowering I cut back to a 1.2 EC and increase at a steady 0.1 EC per week up to about 1.8 to 2.0 EC depending on the nutritional requirements of a particular phenotype. I should also mention that I feed regularly but that I alternate full strength and half strength feedings. This allows me to get more runoff on the half strength days to remove buildup while maintaining my element ratios.

So... EC. Always EC. PPM is always a conversion of the EC so to avoid all confusion we should definitely talk only about the EC measurements the ppm would be based on.

Guest · Jun 1, 2012

OK cool. Yeah I just bought the Bluelab Truncheon Meter which reads both PPM conversions as well as EC.

Trap Bunkin · Aug 5, 2012

@SCMC

That was a very confusing thing when I first started. I actually added a link in my sig so I wouldnt have to explain the issued everytime I offer my help. Nice read

Forums

Ppm

Guest Guest

Guest Guest

PlantEngineer Banned

SCMC Banned

Guest Guest

Trap Bunkin Banned

Share This Page

Network

Forums

Help

Find Us On

Useful Searches

Ppm

Guest Guest

Guest Guest

PlantEngineer Banned

SCMC Banned

Guest Guest

Trap Bunkin Banned

Share This Page