Master Plant-Prod Inc.

Landscape environments present fluctuating temperatures, variable moisture levels, and limited follow-up care. CRFs help buffer against these variables by delivering nutrients predictably over time.

Continued nutrient availability supports:
• Plant vigor
• Appearance
• Performance in the landscape

Consistent nutrition after sale contributes to improved consumer satisfaction and reduced quality issues.

Fertilizer programs designed for greenhouse production must also consider what happens after plants leave the grower.

CRFs are often recommended downstream because they help stabilize root-zone conditions and maintain plant quality beyond production.

For guidance on controlled-release fertilizers, product selection, or application strategies, connect with an authorized Plant-Prod distributor for local support and recommendations.

CRFs can be used alongside water-soluble fertilizers (WSFs). WSFs provide quickly available nutrients and allow growers to adjust formulations or concentrations in response to crop requirements.

When used together:
• WSFs offer flexibility
• CRFs provide a consistent base feed

Fertilizer programs should be tailored to specific crops, growing conditions, and end-use environments.

In containerized systems, nutrients applied through water-soluble fertilizers can be lost through leaching — particularly under rainfall or excessive irrigation.

CRFs release nutrients at steady rates, helping:
• Reduce nutrient runoff
• Minimize leaching losses
• Improve overall fertilizer efficiency

Consistent nutrient availability supports uniform growth, stronger root systems, and improved stress tolerance.

Controlled-release fertilizers are coated with materials such as polymers or resins that regulate how quickly nutrients become available.

Instead of releasing nutrients all at once, CRFs provide gradual, sustained delivery to the root zone.
The rate and duration of release are influenced by:
• Temperature
• Moisture
• Coating thickness

This allows CRFs to be formulated with specific longevities to match production cycles and post-production needs.

Once plants leave the greenhouse, nutrient delivery through water-soluble fertilizers typically stops. CRFs continue supplying nutrients during:
• Shipping
• Retail display
• Early landscape establishment

When longevity extends beyond production, plants receive continued nutrition — helping maintain vigor, appearance, and performance. Single-application use also reduces the need for repeated fertilization, simplifying programs for landscape professionals and consumers.

Landscape environments are far less controlled than greenhouse production.
Irrigation practices, environmental conditions, and user experience vary widely.

Controlled-release fertilizers (CRFs) are often recommended for landscape and consumer applications because they:
• Provide gradual, sustained nutrient supply
• Support consistent nutrition
• Reduce nutrient loss
• Simplify fertilization practices

Their extended release characteristics make them a practical option where ongoing nutrient applications may be infrequent or inconsistent. Learn more in our most recent blog on our website.

Micronutrient balance supports healthy growth and development.
When deficiencies occur, symptoms may include:
• Interveinal chlorosis
• Shortened internodes
• Rosetted growth
• Death of terminal buds
• Stunted growth
Because micronutrient availability is highly sensitive to pH, regular monitoring helps maintain consistent uptake throughout the crop cycle.
Learn more in our most recent blog on our website.

In greenhouse production, micronutrient issues are often tied to root-zone conditions rather than fertilizer absence.
Symptom location provides important diagnostic insight:
• Immobile nutrients show symptoms on new growth
• Mobile nutrients show symptoms on older leaves
Most micronutrients fall into the immobile category.
Understanding this distinction helps narrow down potential causes before testing confirms the diagnosis.