SKU: 18268483538

Humboldt County's Own Magnum 5 Gal

Sale price$152.10 Regular price$169.00
Save 10%

Pay in installments of $42.25 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 8 - Sep 13

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Humboldt County's Own Magnum 5 GalMAGNESIUM AND SULFUR BOOST Photosynthesis is the process whereby the chlorophyll in the leaves converts sunshine and CO2 into sugars. It is the basis of ALL plant growth. No Magnesium, no chlorophyll, no photosynthesis. Sulfur aids in the formation of chlorophyll. MAGNUM is our high potency Magnesium Sulfur boost that will ensure an ample supply of Magnesium and Sulfur for chlorophyll synthesis. Magnesium deficiency is the MOST common cause of poor

MAGNESIUM AND SULFUR BOOST

Photosynthesis is the process whereby the chlorophyll in the leaves converts sunshine and CO2 into sugars. It is the basis of ALL plant growth. No Magnesium, no chlorophyll, no photosynthesis. Sulfur aids in the formation of chlorophyll.

MAGNUM is our high potency Magnesium/Sulfur boost that will ensure an ample supply of Magnesium and Sulfur for chlorophyll synthesis.

Magnesium deficiency is the MOST common cause of poor yields besides overfeeding. The primary symptom of Magnesium deficiency is premature yellowing or interveinal fading of leaves. Sulfur deficiency is characterized by the fading of the veins.

Once yellowing is visible, CO2 consumption has slowed. That affects flower development.

• The most common cause of Magnesium deficiency is the high

Potassium/Phosphorus levels of bloom boosters.

• A secondary cause is overfeeding Calcium

If you are using Deep Breath to accelerate CO2 uptake, or you are using CO2 enrichment, the increased growth rate you expect to see will not happen if you have a Magnesium deficiency. Plants grown under normal CO2 will be even more impaired.

CAL-MAG IS NOT THE ANSWER

  • NO Cal-Mag product on the market contains sulfur
  • Magnesium and Sulfur deficiencies almost always occur together
  • Chlorophyll formation requires BOTH Magnesium and Sulfur

EXCESS CALCIUM CAN CAUSE MAGNESIUM/SULFUR

DEFICIENCY

Calcium and Magnesium are transported through the plant by similar pathways so the ratio of Calcium/Magnesium is important. The higher the ratio of Calcium to Magnesium the more the transport of Magnesium is impaired.

  • The proportion of Calcium to Magnesium in Cal-Mag products is way too high.
  • High Calcium levels “LOCK-UP” Sulfur which is necessary for the formation of Chlorophyll.

• Most Cal-Mags are loaded with Nitrogen (check the label) so you’re adding a “grow” nutrient right in the middle of bloom.

Remember, the Micro part of all 3 part base nutrient lines is loaded with Calcium so adding a Cal-Mag can lead to problems. We’ve actually seen a Cal-Mag product worsen a Magnesium and Sulfur deficient plant.

BOTTOM LINE:
TREAT A MAGNESIUM DEFICIENCY WITH MAGNESIUM AND SULFUR ONLY!

Chlorophyll deficiency in the bloom stage causes fading yellowing leaves right when flowers are putting on mass at a rapid rate. Magnum) with heavy Magnesium and Sulfur will keep a plant's energy factories optimized and the B1 helps relieve the stress caused by high performance bloom formulations.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 18268483538

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 29 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Audrey T.
Whiting, US
★★★★★ 5
Great Supplements. Good prices. Made in the USA
Size: 90 Count (Pack of 1)
I love this company for all my supplement needs. My only complaint about the magnesium supplement is that the capsules are pretty large. If you have a problem swallowing pills/capsules you may have a bit of trouble swallowing these. However, I’ve never had magnesium that was easy to swallow. Most of Pure Supplements are small and very easy to swallow. The magnesium is the exception. All magnesium pills are large.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
J
Verified Purchase
Jamie Harmon
Houston, US
★★★★★ 4
Constipation relief
Size: 180 Count (Pack of 1)
I use this for my 3 year old, as he’s nervous about pooping due to past discomfort. Safe and effective!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
N
Verified Purchase
Natalia Siguenza
Fort Morgan, US
★★★★★ 5
The brand is very trustworthy!
Size: 180 Count (Pack of 1)
This is an excellent supplement, I highly recommend it. I can feel the changes after just a couple of weeks of using it. It's very effective in helping me fall asleep after trying lots of different things
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
S
Verified Purchase
Susan Peterson
Port Orchard, US
★★★★★ 5
Helped wonderfully with sleep and anxiety.
Size: 180 Count (Pack of 1)
Very good product, Has helped immensely by taking 2 capsules about 2 hrs before bedtime. I have had terrible time falling asleep and these have helped! I’ve ordered about 4 times, don’t want to be with out them.!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
M
Verified Purchase
Mrs. Carolyn P. Ryder
Chelsea, US
★★★★★ 5
Why magnesium citrate.
Size: 180 Count (Pack of 1)
We take this product for consistent bowel control. My husband takes two am and pm. I take one am and pm, sometimes take an additional one. Works well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026

recommand products