HHTHH 36-inch Coconut Coir Trough Liners, 2-Pack — Pre-formed Replaceable Liners for Window Boxes & Fence Planters

HHTHH's 36-inch pre-formed coconut fiber trough liners are replaceable, breathable plant liners made to fit window boxes, fence baskets and trough planters for easier planting and moisture retention.

These molded coir liners come as a set of two, each measuring 36" (91 cm) long, 8" (20 cm) wide and 8" (20 cm) deep. Constructed from 100% natural coconut fiber, they provide a porous planting medium that supports root aeration while holding water better than plain soil. The liners are shaped to slip into rectangular troughs and window planters, giving a neat finished look and simplifying seasonal planting or liner replacement.

How do these liners help my window box or fence planter?

Pre-formed coconut liners create a consistent, breathable planting cavity that keeps soil contained and improves drainage compared with bare metal or plastic troughs. Because they're molded to trough dimensions, they save time fitting and trimming. They also present a tidy edge that hides planter interiors and complements outdoor decor.

• 36" long by 8" wide and 8" deep — fits standard rectangular troughs
• Pre-formed shape reduces installation time and trimming
• Natural coir allows good airflow to roots while preventing soil loss
• Provides a clean, finished appearance inside visible planters

Will coconut fiber liners retain moisture for my plants?

Coconut coir absorbs and holds moisture more effectively than bare soil but remains porous so roots still get air. In hot, windy or sun-exposed locations, liners can dry faster than deeper beds, so occasional monitoring is needed. For extended moisture retention, add water-absorbing crystals, perlite, or a moisture-retentive potting mix as directed.

• Coir stores water while maintaining oxygen flow to roots
• Additives like water crystals or perlite boost moisture-holding capacity
• Recommended to check watering more often in hot/windy weather
• Suitable for annual flowers, trailing plants, and small vegetables

How do I install and maintain these HHTHH trough liners?

Installation is simple: place the molded liner into your trough, trim if necessary, and fill with potting mix and plants. Secure the liner in place if your planter has attachment points; otherwise it sits snugly by shape. Over time, replace the liners seasonally or when wear appears to keep planters fresh and hygienic.

• Set liner into trough, align edges, and trim for custom fit if needed
• Fill with a well-draining potting mix and plant as usual
• Inspect liners annually; replace when frayed or compacted
• Pair with hanging baskets or fence systems that accept pre-formed liners

What plants work best in a 36" coir trough liner?

The trough profile suits a variety of ornamentals and small edibles — think trailing petunias, ivy, snapdragons, herbs, and salad greens. Plants that prefer good drainage and airflow to roots will thrive. Choose mixes and watering schedules to match the crop and exposure to sun and wind.

• Trailing annuals: petunias, calibrachoa, ivy
• Upright flowers: snapdragons, marigolds, lobelia
• Herbs and greens: basil, parsley, lettuce
• Use lighter potting mix for better drainage and root health

Who is this for? Home gardeners, balcony dwellers and landscapers who want an easy, natural liner solution for rectangular window boxes and fence planters will appreciate the HHTHH 36" coir trough liners. They suit seasonal replanting, rental properties where quick replacement is helpful, and anyone seeking an eco-friendly, breathable alternative to synthetic liners. If you need a ready-shaped, reusable natural liner that balances moisture retention with root aeration, this two-pack addresses common planter preparation and maintenance needs while keeping displays tidy and plant-friendly.