High N "flowering" nutrients

[iobloop]

Many times i find aka flowering nutrients with high N content. 6-4-6 for example, aren't you supposed to restrict N in flowering, what it the difference
if you use low N nutrients and ones that i mentioned in flowering? And why are this nutrients called flowering nutrients but still have high N content? For example almost all two component nutrients for coco are for trough all the grow with similar ratios. Is adding PK in that case scenario a must, will results be much inferior if not? Thanks

 

[TrippleDip]

Try it! Imo you will be balancing trying to get them enough K while not burning them with too much N and in the end you will have less or worse bud. The acceptable ranges for nutrients are very wide though and vary with strain, medium and environment so will clearly work for some cases.

I would use the PK booster personally because otherwise you are wasting fertilizer the plant doesn't need. Also check out dyna go cycles, never used their stuff, so not a recommendation, but they use one fert through the whole cycle. Ie high ppm N in flower.

 

[iobloop]

Perhaps these nutes are better for other plants. I thought all flowering nutes supposed to have low N, so i did a mistake and buyed nutrients without looking at ratios. I do add PK as i noticed a bit dark leaves in beginning of flowering, i believe plant responds to ratios its not just toxicity but also stretch and fluffier buds and veg smell, but i'm about to run out of PK and i will have to go trough some trouble acquiring nute's because of current situation so i wondered if there is gonna be big difference without booster.

 

[TrippleDip]

You won't have trouble getting through the grow with them. The question of being optimal is open.

If trouble with acquiring nutes is $, go to your garden store and pick up a container of monopotassium phosphate, and a container of potassium sulphate. Usually they are each around $5 for 2lbs. 50g of potassium sulphate and 70g of monopotassium phosphate per liter is a (0 4 5) bloom booster which costs almost nothing.

If you are simply in an area where name brand nutrients are hard to find, you can probably get the above from any farm for virtually nothing OR if you are in soil you can top dress with bone meal/dust for P and banana peels/eggshells for K.

Edit to say that you can also make a saturated solution of mkp in water (about 1 lb per L at 20*C) and it will be (0 11 7), which is ok but too high in P for anything but tomatoes imo, but would probably cost around $2 to source at your local hydroponics shop or farm/country store.

 

[iobloop]

No its epidemic stores are closed and so on, nothing else =D. Thank you for your anwsers.

 

[LeeTaurus]

monopotassium phosphate

how much of this should you use? When to use it? I am growing in a 2x2 blurple led

 

[cannabineer]

You won't have trouble getting through the grow with them. The question of being optimal is open.

If trouble with acquiring nutes is $, go to your garden store and pick up a container of monopotassium phosphate, and a container of potassium sulphate. Usually they are each around $5 for 2lbs. 50g of potassium sulphate and 70g of monopotassium phosphate per liter is a (0 4 5) bloom booster which costs almost nothing.

If you are simply in an area where name brand nutrients are hard to find, you can probably get the above from any farm for virtually nothing OR if you are in soil you can top dress with bone meal/dust for P and banana peels/eggshells for K.

Edit to say that you can also make a saturated solution of mkp in water (about 1 lb per L at 20*C) and it will be (0 11 7), which is ok but too high in P for anything but tomatoes imo, but would probably cost around $2 to source at your local hydroponics shop or farm/country store.

5 and 7 grams; you’re an order of magnitude off

 

[LeeTaurus]

5 and 7 grams; you’re an order of magnitude off

What do you mean?

 

[TrippleDip]

5 and 7 grams; you’re an order of magnitude off

Then how tf are my plants still alive?!?

Math for those interested: KPH is listed as (0 52 34) and K2SO4 as (0 0 50), the final P concentration will be 52 * gKHP/1000g, and the final K concentration will be 34 * gKHP/1000g + 50 * gK2SO4/1000g (1000g = 1L). If you do the math for 50 and 70 grams, you will get (0 3.6 4.9). The reason I chose these numbers for my bloom booster is that 10mL per 4L(canadian gallon) is equal to 100ppm K. That is also why I make my veg solution with 332g of calcium nitrate per L, 10mL per canadian gallon is 100ppm. I do like the lucas formula and add my chelated trace elements to my calcium nitrate, and add epsom salts in with the bloom booster for a complete two part. Costs me about $4 per liter - saves me less than $1 per oz so is probably not worth the hassle for 99% of people. To be fair, this is my first grow using this formula, but the plants are starting to flower now and look good.

 

[TrippleDip]

Also for those interested KHP is a buffer, so if you use it as the main PK source in a fert it will naturally buffer to pH 6.

 

[Bignastydro]

Then how tf are my plants still alive?!?

Math for those interested: KPH is listed as (0 52 34) and K2SO4 as (0 0 50), the final P concentration will be 52 * gKHP/1000g, and the final K concentration will be 34 * gKHP/1000g + 50 * gK2SO4/1000g (1000g = 1L). If you do the math for 50 and 70 grams, you will get (0 3.6 4.9). The reason I chose these numbers for my bloom booster is that 10mL per 4L(canadian gallon) is equal to 100ppm K. That is also why I make my veg solution with 332g of calcium nitrate per L, 10mL per canadian gallon is 100ppm. I do like the lucas formula and add my chelated trace elements to my calcium nitrate, and add epsom salts in with the bloom booster for a complete two part. Costs me about $4 per liter - saves me less than $1 per oz so is probably not worth the hassle for 99% of people. To be fair, this is my first grow using this formula, but the plants are starting to flower now and look good.

Your math is erroneous.

Your mixing 50 grams of (0 52 34) and 70 grams of (0 0 50). You created a blend of 50/120*(0 52 34) + 70/120*(0 0 50). Combining them gives you a (0 22 43).
Or if I got the ingredients mixed it would be 70/120*(0 52 34) + 50/120*(0 0 50) for a final ratio of (0 30 41) which is closer to your ratio but still doesn't add up.
This is your bloom booster ratio. If you dilute it with water the ratio still stays the same so I'm not sure how you arrive at (0 3.6 4.9). You are assuming the fertilizer ratio is listed in grams per kilogram or something weird which is incorrect. The ratio is the amount of grams K per gram of KSO4.

Regardless, these two ingredients can be used to make a well balanced bloom booster.

 

[TrippleDip]

We are both right, and saying the same thing. If you mix the dry salts you will have 120g of salt and the ratio will be (0 30 41), now if you dissolve that in one litre (1000g) of water you will have 120/1000*(0 30 41) = (0 3.6 4.9)

Now, why I am glad that you brought this post to my attention: If you use khp as a buffer as described above, you will need a base because the pH of straight monopotassiumphosphate is about pH 4.5, this equates to just under 2g of KOH or 1.5g of NaOH (will work out to ~10ppm sodium in the feed solution if using NaOH), obviously always add base to water and dissolve the base separately from the salts so it can be added piecewise..

Last update is that 1) I separated my trace elements from my nitrate solution so that I could play around with the amounts, 2) my nitrate solution now uses both calcium and potassium nitrate to decrease the amount of calcium, and 3) I made a separate lower P bloom booster for veg and late bloom after reading comments here saying that high P in late flower will affect taste and I want to see if I can safely decrease P without getting any deficiencies.

 

[xtsho]