Greensand is a  natural substance, derived from ancient marine deposits, is rich in glauconite – a mineral brimming with essential nutrients such as iron, potassium, magnesium, and trace elements.

Benefits

  • It improves both the structure and moisture retention capabilities of your garden’s soil.
  • Contrary to quick-release synthetic fertilizers that often lead to nutrient runoff, greensand meters out its minerals gradually—providing plants with sustained nutrition without the peril of depletion.
  • Natural pH Adjustment

A field test by Rutgers University in a sandy loam soil with greensand applied in the row at the time of planting, found that the application of greensand increased the yield of potatoes by 16%.

Nutrients 

  • The high silica content in greensand toughens cell walls which bolsters plants against pests and diseases.
  •  Iron is vital for chlorophyll synthesis, enhancing photosynthesis—the critical process through which plants harness energy from light.
  • Magnesium helps chlorophyll while facilitating crucial enzyme functions necessary for robust growth.

Advantages 

Slow nutrient release makes it an excellent option for long-lasting plant nutrition without the risks of over-fertilization. 

  • Plants forge stronger root systems crucial for efficient nutrient absorption.
  • A potent mix of micronutrients strengthens plants’ natural defenses against fungal threats and pest incursions.
  • Elements like magnesium prepare plants to withstand environmental challenges such as drought or fluctuating temperatures.

Affiliate Disclosure: As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.

Where to Buy 

Old Cobblers Farm

Greensand in bag

The Organic Greensand Fertilizer by Old Cobblers Farm is a premium green sand product designed for soil amendments in organic vegetable gardens and indoor plants. This 5 lbs. package provides essential nutrients to improve soil quality and support healthy plant growth.

Check latest price for Old Cobblers Greensandon Amazon

Soil Sunrise

The Soil Additive from Soil Sunrise are a High end Soil Conditioner – Derived from marine mineral deposits.

Application

  • Boost your seedlings and transplants with a powerful nutrient kick by incorporating greensand at planting. Watch them thrive from the get-go!
  • Get a head start on your garden by incorporating spring’s arrival into your efforts to revitalize your garden beds. This will prepare your plants for strong, early growth.
  • Apply mid-way through the growing season to boost lagging plants; this timely intervention supplies critical minerals necessary for blossoming and fruit set.

Revitalizing Soil Structure 

The gritty yet porous nature gives essential aeration to dense soils. They forge air pockets within clay-rich soils, easing root respiration and enhancing water infiltration.

Enhancing Soil Fertility 

Its slow nutrient release makes it a perfect helper for every gardener.

  • Crucial for robust plant health, potassium facilitates photosynthesis, boosts fruit quality, and bolsters disease resistance.
  • Trace elements like iron which fosters chlorophyll production—essential for vibrant foliage.

By adding it to your garden every 4-5 years, you can continuously rejuvenate your soil without the risks of nutrient overload or chemical buildup found in other additives.

urban composting for beginners

Greensand vs. Perlite:

  • Unlike perlite which primarily augments soil drainage—ideal for drought-tolerant species such as succulents—it ensures adequate moisture retention.
  • Perlite is chemically inert and does not contribute nutrients to the soil. Conversely, greensand have trace minerals that are essential for growth.

Greensand vs Lime:

Lime can swiftly alter acidic soils making them more alkaline—a necessity for certain vegetables like cabbage—but improper use may result in nutrient lockout or toxicity. Greensand offers a subtler pH adjustment while simultaneously enriching the soil with essential nutrients.

Advantages 

  • Gradual potassium release from greensand prevents shock feeding problems often associated with synthetic fertilizers.
  • Particularly beneficial in amending dense clay or excessively sandy soils; it improves root penetration and water distribution.

Disadvantages 

  • When urgent correction of serious issues is necessary, it may not be the best option.
  • Generally heavier than other products leading potentially higher transportation costs,

Key Considerations 

  • The origin  significantly influences its mineral richness. Choose brands that are transparent about their sourcing locales and extraction methods.
  • Verify that labels clearly display vital nutrient information such as potassium levels, iron content, magnesium availability, and other trace elements critical for robust plant growth.
  • Utilize feedback from user reviews and horticultural communities online to assess various brands’ effectiveness before finalizing your purchase.
BeeJay
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