- Home Page /
- Patio, Lawn & Garden /
- Gardening & Lawn Care /
- Soils, Mulches & Planting Media /
- Fertilizers & Plant Food /
- Humboldts Secret CalMag & Iron | Calcium, Mag...
0 ratings
Item #:
10609173
Humboldts Secret CalMag & Iron | Calcium, Magnesium & Chelated Iron Nutrient Fertilizer | Hydroponic Supplies for Vegetative & Flowering Growth in
Item #:
10609173
GMD 4250
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Friday, July 24
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
Humboldts Secret Calcium, Magnesium and Iron Supplement is a well-balanced formula designed to address any plant deficiencies that may be present, efficiently supporting nutrient uptake and absorption, and is suitable for hydroponics, soil, and container gardens.
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Comprehensive Nutrition
This liquid supplement provides essential calcium, magnesium, and iron, promoting healthy plant growth during both vegetative and flowering stages.
Hydroponic Optimization
Specifically formulated for hydroponic systems, ensuring efficient nutrient absorption and maximizing yields compared to traditional fertilizers.
Large Capacity
A generous 2.5-gallon size reduces frequency of purchases and provides a cost-effective solution for avid hydroponic gardeners.
Product Details
- Formulated as a source of calcium, magnesium, and chelated iron to address plant micronutrient deficiencies
- Effectively corrects common plant nutrient deficiencies and imbalances
- Supports nutrient uptake and absorption, promoting healthy growth in both vegetative and flowering stages
- Suitable for hydroponics, soil, and container gardens, ensuring strong and healthy plants
- Highly recommended for plants growing in coco coir medium or using reverse osmosis water for magnified absorption
- An essential liquid nutrient fertilizer for promoting robust and productive plant growth
| Item Weight | 2.5 lbs (1.13 kg) |
Who Should Buy?
-
Hydroponic Growers
Ideal for hydroponic systems, enhancing nutrient uptake during both vegetative and flowering stages of plant growth.
-
Plant Enthusiasts
Perfect for dedicated gardeners keen on optimizing their plants’ mineral intake for robust growth and enhanced yields.
-
Vegetable Cultivators
A great choice for growers of vegetables needing extra calcium and magnesium for healthier and more productive plants.
-
Soil Growers
Not suitable for traditional soil growing methods, which may already provide sufficient nutrients naturally without supplementation.
-
Budget-Conscious Users
May not be ideal for users looking for low-cost fertilizer options due to its premium pricing for larger volumes.
-
Beginner Gardeners
Less suitable for novices who may struggle with understanding the specific nutrient needs of their plants in detail.
Product Description
Humboldts Secret CalMag & Iron | Calcium, Magnesium & Chelated Iron Nutrient Fertilizer | Hydroponic Supplies for Vegetative & Flowering Growth in Soil, Coco, Hydroponics or RO Water | 1 Gallon
Dietary Supplement Disclaimer
Statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What are the main benefits of using Humboldts Secret Calcium, Magnesium, and Iron Supplement?
Answer: Humboldts Secret Calcium, Magnesium, and Iron Supplement is designed to provide essential nutrients that support healthy plant growth and development. These nutrients help prevent deficiencies that can negatively affect plant performance. Calcium promotes cell wall strength, magnesium aids in chlorophyll production for photosynthesis, and iron contributes to overall plant vitality. Using this supplement ensures that your plants flourish during both the vegetative and flowering stages, resulting in improved yield and quality. -
Question:
How do I apply Humboldts Secret Calcium, Magnesium, and Iron Supplement in my hydroponic system?
Answer: To use Humboldts Secret Supplement effectively in your hydroponic system, follow the manufacturer’s mixing instructions for dilution. Typically, you will need to add a specific amount of the supplement to your nutrient solution. Regularly monitor your nutrient levels, as this product can enhance the nutrient profile in your reservoir, promoting better health in your plants. It's ideal during critical growth phases, giving your crops the boost they need to thrive in a hydroponic environment. -
Question:
Can this supplement be used for soil-grown plants as well?
Answer: Yes, Humboldts Secret Calcium, Magnesium, and Iron Supplement can be utilized for soil-grown plants. While it is particularly popular in hydroponics, its nutrient formulation is equally beneficial for plants in any growing medium. By following dilution rates suggested on the label, you can enhance nutrient uptake in the soil, ensuring your plants receive the essential minerals they need during their growing stages. -
Question:
Is this product safe for all types of plants?
Answer: Absolutely! Humboldts Secret Calcium, Magnesium, and Iron Supplement is safe for a wide array of plants, including vegetables, flowers, and herbs. This versatility makes it a go-to choice for indoor and outdoor gardeners alike. However, always refer to the specific needs of your plants and adjust the dosage accordingly. This way, you can cater the nutrient levels appropriately and minimize any risk of over-fertilization. -
Question:
How often should I use this calcium, magnesium, and iron supplement?
Answer: The frequency of application depends on the growth stage of your plants and their specific nutrient needs. Generally, it is recommended to use Humboldts Secret Supplement every 1-2 weeks during the vegetative and flowering stages. Regularly check for signs of deficiency in your plants, as this can help you adjust the application schedule. Consistent use will help maintain optimal nutrient levels, promoting vigorous growth and productivity. -
Question:
What symptoms indicate that my plants may need this supplement?
Answer: If your plants display yellowing leaves, stunted growth, or poor flowering, it may indicate a nutrient deficiency. Yellowing, especially along leaf veins, can signify a lack of iron, while leaf edges curling can suggest magnesium deficiencies. Regularly inspecting your plants for these symptoms can guide you in using Humboldts Secret Supplement to effectively address and rectify these issues, ensuring your plants regain their health and vitality. -
Question:
Is Humboldts Secret Supplement compatible with other nutrients?
Answer: Yes, Humboldts Secret Calcium, Magnesium, and Iron Supplement can be used in conjunction with other nutrient products. It enhances the overall nutrient profile of your feeding regimen, improving nutrient absorption for your plants. However, it’s wise to monitor the total nutrient concentration to avoid over-fertilization. Many growers combine this product with their standard nutrient solutions to create a balanced diet for their plants. -
Question:
What type of container is the 1 Quart size sold in?
Answer: The 1 Quart size of Humboldts Secret Calcium, Magnesium, and Iron Supplement typically comes in a sturdy, recyclable bottle that is designed for easy pouring and accurate measuring. Its compact size allows for convenient storage and handling while ensuring that you get the exact dosage needed for your plants. The bottle is also designed to preserve the quality of the liquid nutrients inside, keeping them effective for your gardening needs. -
Question:
Can I mix this supplement with my regular fertilizer?
Answer: Yes, you can mix Humboldts Secret Calcium, Magnesium, and Iron Supplement with your regular fertilizer. This combination allows for a more comprehensive nutrient delivery system, as it enhances the availability of essential minerals to your plants. Be sure to follow the recommended dosages for both products to achieve a well-balanced nutrient solution that promotes optimal growth and development during all phases. -
Question:
Where can I buy Humboldts Secret Calcium, Magnesium and Iron Supplement in The Gambia?
Answer: You can purchase Humboldts Secret Calcium, Magnesium, and Iron Supplement from Ubuy in The Gambia. Ubuy offers a convenient online shopping experience with a variety of options to choose from. You can easily find this essential product for your hydroponic needs on their platform, ensuring a swift and straightforward way to enhance the health of your plants.
Humboldts Secret Fertilizers & Plant Food Editorial Review
No editorial reviews found
Customer Reviews & Ratings
1 customers ratings
-
5 Star
100%
-
4 Star
0%
-
3 Star
0%
-
2 Star
0%
-
1 Star
0%
Review this product
Share your thoughts with other customers
Platform Trust & Buyer Confidence
MT
Mohd
Verified buyer
“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer
“Accurate delivery timing given”
16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer
“Not madly expensive like I thought, and much quicker than promised.”
15 June 2026 · via Trustpilot
LM
Leila
Verified buyer
“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”
6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer
“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
GMD 4250
Order now and get it around Friday, July 24
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Provides essential micronutrients
- Corrects common plant deficiencies
- Efficient nutrient uptake and absorption
- Suitable for Hydroponics, soil, and container gardens
- Suitable for coco coir medium and reverse osmosis water
- Optimal for vegetative and flowering stage
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.