Concentrated organic humus: Enhances soil structure and fertility for robust plant growth
Contains calcium and iron: Balances soil pH and supports nutrient uptake
Humic acid from Leonardite: Promotes beneficial soil microbes and plant vitality
Fast-acting and slow-release nutrients: Provides immediate results and continues to enrich soil over time
Cost-effective formula: Most cost-effective for large areas with visible results quickly
Summarized by Shop
Optimize is concentrated organic matter, calcium and iron.
Optimize enriches soil over time, attracting zillions of beneficial soil microorganisms, which are essential for building rich, lively soil. Optimize is packed with fully decomposed organic matter (true humus) to foster an optimal environment for all plants to flourish - like a
Nutrient Content
Calcium, Iron, Humic Acid (from Leonardite)
Application Method
Solid
Suitable Space
Outdoors
Ingredients
14% humic acid from Leonardite, 78% iron
Brand
John and Bobs
Summarized by Shop
5.0
37 ratings
5
4
3
2
1
God Bless John and Bob’s. Thanks for this great product! The truth is in the soil!
U
Under · July 30, 2026
John & Bob’s fertilizer review
This is hands down the best fertilizer and soil amendments that I have ever used. My plants look very lush and healthy. My Kentucky bluegrass just made it through 100 degree weather and still looks dark green and healthy. I will definitely continue to use your fertilizer for my garden, thanks!
A
Anonymous · July 7, 2024
Optimize
I started using Optimize last fall mainly for my roses. I had a severe problem with slug worms which never went away no matter what I tried. I combined with the Blend and also worm castings and the problem is most definitely decreased. The roses look so much healthier. I am a firm believer in John and Bob’s products. I will continue using their products in the future!