GLASTRESGREENS

Architecture • Planters • Living
Official Maintenance Guide

Preserving Architectural Beauty

Glastres Greens FRP planters are engineered using advanced fiberglass composites and automotive-grade finishes. While incredibly durable, proper handling, precise soil selection, and disciplined seasonal maintenance are essential to ensuring your planters remain flawless for generations.

Expert care and maintenance of premium FRP architectural planters

Structural Integrity & Installation

The longevity of an architectural planter relies heavily on correct installation physics. Improper soil density or drainage blockages can compromise even the strongest materials.

Potting Soil Physics

It is critical to use lightweight potting soil specifically formulated for container gardening (usually a soil/peat mix). Heavy natural earth or sand absorbs and retains excessive water, applying immense outward hydrostatic pressure that can cause structural damage to large planters.

Drainage & Isolation

Planters are not pre-drilled unless requested. If kept outdoors, you must ensure adequate drainage. Use an interior layer of expanding clay and fiber fleece over the drainage hole to prevent soil blockages. Never allow planters to sit in stagnant water.

Safe Handling

Do not push or pull fully-planted pots by the top lip. Always maneuver planters while empty. For indoor placement on delicate surfaces, apply standard felt pads to the base to prevent scratching. Misuse voids the structural warranty.

The Master Maintenance Ledger

A disciplined approach to preserving the finish and structural integrity of your architectural assets.

For Residential & Commercial
Weekly
Surface & Aesthetics
Lightly dust the exterior with a dry, soft microfiber cloth to prevent environmental particulate build-up. Inspect the base and surrounding floor to ensure no stagnant water is pooling.
Monthly
Deep Clean & Hydration
Wash the exterior using fresh water and a mild, plant-safe detergent. Use a soft sponge. Check the interior drainage hole to ensure roots or soil have not bypassed the fiber fleece and created blockages.
Bi-Annually
UV Restoration (Waxing)
Thoroughly clean and dry the planter. Apply a premium automotive wax or pure carnauba wax to the exterior gelcoat in circular motions. This creates a sacrificial barrier against UV rays, restoring factory shine and preventing color oxidation.
Annually
Root System Audit
Inspect the plant for "root binding." Aggressive, overgrown root systems can exert massive outward pressure on the internal walls of the planter. Prune roots or repot the plant into a larger container if necessary to prevent structural stress fractures.

Advanced Surface Protocols

Hard Water & Calcification

In areas with hard municipal water, white calcium deposits or water lines may appear on dark-finished planters. Do not use harsh calcium-removal chemicals. Instead, create a mild solution of 1 part white vinegar to 5 parts water. Gently wipe the affected area, let sit for 2 minutes, and immediately rinse thoroughly with fresh water.

Micro-Scuff Polishing

If the planter suffers minor surface scuffs or dull spots from physical contact, a high-quality marine or automotive fiberglass polishing compound can be used to buff the scuff out of the gelcoat layer, followed by a coat of wax to seal the repair.

Approved
  • • Soft microfiber cloths
  • • Mild, plant-safe soap
  • • Automotive wax
  • • Diluted white vinegar
Prohibited
  • • Bleach & harsh chemicals
  • • Pressure washers
  • • Abrasive scrubbers / Steel wool
  • • Commercial calcium removers
Extreme Climate Protocols

Frost-Proofing & Winter Care

The physics of freezing water are powerful enough to shatter solid steel pipes and asphalt. While our fiberglass matrix is immensely resilient, trapped ice expansion will destroy any container. If keeping planters outdoors during freezing winters, adhere strictly to these protocols:

  • Mandatory Drainage: Containers must have an unblocked drainage hole. Snow and rain that turns to ice inside a sealed pot will expand outward and fracture the fiberglass walls.

  • Elevate on Bases: Support outdoor containers with separate bases/feet. If placed flat on the ground, root capillary force can freeze the pot to the surface, causing sheer-stress damage.

  • Empty Receptacles: Turn empty planters upside down or cover them tightly. Remove or flip all saucer trays to prevent ice block formation.