Nutrients: Should I follow the recommended g/L or EC values?

C

Chili420

Member
Thank you for hearing me!

I have powder feeding by greenhouse fertilizers which have a chart with the recommended EC and g/L for each product.

The G/L don't reach the required EC... Barely half.

For week 8 of flowering (oficial chart):

Hybrids:

0,5 g/L
EC: 0,7

Booster:

0,6 g/L
EC: 0,6

Calcium:

1,3 g/L
EC: 0,5

EC Total: 1,8

I don't use the calcium.
My rested tap water has 0,3 EC

Using the recommended g/L the EC should raise by the stated amount.

When mixing with my water 0,5 g/L of hybrids the EC goes up by 0,3 (from 0,3 to 0,6)

Same for pk booster.

They raise EC less that stated, almost half!

Anyone else having the same issue?
Maybe my EC meter is broken, but it's new! (And 0,3 for tap water seems reasonable)

I ended up adding more of each to reach the recommended EC for each product.

So it was: 0,7 hybrids + 0,6 Booster + 0,3 water = 1,6


It's strange because they brag about being simple and not needing to measure EC. If I followed the recommended g/L I would be under feeding!!!
 
Failmore

Failmore

Well-Known Member
The only way you would know you were under feeding is if the plant told you it was hungry.

Don't get stuck worry about vendor recommended ec values.

Just listen to the plant. Start low and work your way up as the plant ages.

If I mix my jacks 321 I don't get the exact same ec values as the paper says. I'm not worried. I use 25% of what they say for most of the grow anyways.

Pick a target ec value and then mix your nutrients to that target ec.
 
C

Chili420

Member
Failmore said:
The only way you would know you were under feeding is if the plant told you it was hungry.

Don't get stuck worry about vendor recommended ec values.

Just listen to the plant. Start low and work your way up as the plant ages.

If I mix my jacks 321 I don't get the exact same ec values as the paper says. I'm not worried. I use 25% of what they say for most of the grow anyways.

Pick a target ec value and then mix your nutrients to that target ec.
Click to expand...
Thank you for the reply.

The problem is that I changed my nutrients mid flowering.

I had some deficiency and the old nutrients were in bad shape (bad quality, shady provider, etc)

So I changed to these and I'm trying to give them a good nutrient concentration.
 
Lagged

Lagged

Well-Known Member
Chili420 said:
Thank you for hearing me!

I have powder feeding by greenhouse fertilizers which have a chart with the recommended EC and g/L for each product.

The G/L don't reach the required EC... Barely half.

For week 8 of flowering (oficial chart):

Hybrids:

0,5 g/L
EC: 0,7

Booster:

0,6 g/L
EC: 0,6

Calcium:

1,3 g/L
EC: 0,5

EC Total: 1,8

I don't use the calcium.
My rested tap water has 0,3 EC

Using the recommended g/L the EC should raise by the stated amount.

When mixing with my water 0,5 g/L of hybrids the EC goes up by 0,3 (from 0,3 to 0,6)

Same for pk booster.

They raise EC less that stated, almost half!

Anyone else having the same issue?
Maybe my EC meter is broken, but it's new! (And 0,3 for tap water seems reasonable)

I ended up adding more of each to reach the recommended EC for each product.

So it was: 0,7 hybrids + 0,6 Booster + 0,3 water = 1,6


It's strange because they brag about being simple and not needing to measure EC. If I followed the recommended g/L I would be under feeding!!!
Click to expand...
The recommended amounts are generally pretty BS. I learned this the hard way by nannering out 1 of my plants. Most people will tell you to cut the amounts in half, though I'm not sure if it varies brand to brand.
 
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