Premium Planter Care Guide

Serene Yards lists fiberglass planters from two manufacturers, Jay Scotts and Cosapots. They are built differently and they publish different care instructions, so this guide keeps them separate wherever that matters. Everything below is what each manufacturer publishes about its own planters.

When your planter arrives

Unpack it and check it before you plant. A planter reported damaged on arrival is straightforward to resolve; one reported after it has been planted is not.

• Move it by the body, never by the rim, and never by the plant.
• Do not leave it sitting in its carton if the carton is damp. The Jay Scotts warranty notes that storing planters in wet or steamy cartons or standing water can damage the finish, and that normal use with water draining off the finish after installation causes no harm.
• Cosapots advise leaving the protective film on until the planter reaches its final position.

Planting your planter

Jay Scotts publish two methods. Which you use depends on whether the planting is permanent or seasonal.

Direct planting

For permanent installations. Jay Scotts' method, in their order:

1. Line the base of the planter with permeable landscape fabric.
2. Add a lightweight drainage layer, such as rinsed gravel or lava rock.
3. Separate this from the soil with a second layer of landscape fabric.
4. Fill with a high-quality, well-draining potting mix.

Drop-in planting

For interiors and seasonal programmes where plants get rotated. The plant stays in its nursery pot and the pot sits inside the planter:

1. Use the optional internal shelf, available for many models.
2. Place the nursery pot or fabric grow bag directly onto the shelf.
3. Stabilise any voids around the pot with a lightweight filler. Jay Scotts list rubber mulch, plastic bottles, packing peanuts, wood chips and empty nursery pots.
4. Conceal the pot's rim with moss, gravel or river rock.

The shelf itself weighs about 3 to 5 lbs and supports 75 to 100 lbs. It is available on selected models only and at additional cost, so ask before assuming a given planter can take one.

Potting a Cosapots planter

Cosapots publish their own sequence:

1. Drainage holes in the bottom for outdoor use.
2. Fill with substrate, taking advice from a plant specialist on what suits the plant.
3. Fill only to the line on the underside of the inner rim, not above it.
4. Cover the substrate with bark chippings.
5. Never exceed the maximum weight of the planter.

What not to use

Jay Scotts specifically name these as materials not to use as a bottom layer in direct planting. Some of them, wood chips included, are fine as void filler around a nursery pot in drop-in planting. The distinction is where they sit.

• Heavy garden soil
• Fine sand
• Biodegradable packing peanuts
• Chemically treated materials
• Wood chips

Biodegradable peanuts are the one that catches people out. They break down, the fill collapses, and the plant sinks.

Drainage

Both brands ship undrilled unless you ask, and both will add drainage free of charge if you request it on the product page. A drilled planter is final sale, because drilling cannot be undone.

Jay Scotts specify 1 to 2 inch holes every 12 inches of planter space, with at least four or five on a 60 inch planter. Cosapots specify a 25 mm bit suitable for metal materials. Our complete guide to planter drainage covers the detail, including what to do if a planter has no holes and why a gravel layer does not help.

Watering

Water until you see runoff at the drainage holes, then stop. That confirms the water has travelled the whole soil column rather than wetting the top inch.

Check by finger rather than by schedule: push a finger two inches into the mix, and water only if it is dry at that depth. Large planters hold more water and need watering less often than small ones, not more. In full sun, on a roof, or in wind, everything dries faster.

Do not let a planter stand in its own runoff. Raise it on feet or a riser so water escapes sideways rather than pooling underneath.

Cleaning: the instructions differ by brand

Cleaning a Jay Scotts planter

Jay Scotts describe their planters as requiring minimal maintenance. Both glossy and matte finishes can be cleaned with standard household cleaning products such as dishwashing soap. Avoid solutions with bleach, power washing, steel wool or abrasives, all of which may scratch the planter.

On glossy finishes, they say an annual polish with automotive or marine wax enhances the look and provides extra protection, especially in extreme weather. They do not recommend wax for matte finishes unless it is specifically formulated for matte.

Cleaning a Cosapots planter

Cosapots are more restrictive, and their wording is absolute. Always use a wondersponge. Never use an abrasive cloth or cleaners. Never use chemical or corrosive products. Only use a little water, or the Cosapots cleaning spray.

For stubborn marks, Cosapots offer a cleaning kit: spray it on the surface, let it soak for two to five minutes, lift the stain with a sponge or soft scrubbing brush, then rinse with water.

In short: the dish soap that is fine on a Jay Scotts planter is not what Cosapots specify for theirs.

Scuffs, scratches and repairs

Jay Scotts note that minor scuffs and scratches on glossy finishes can often be buffed out, and they offer touch-up paint kits for nicks and scratches. Contact us and we will arrange it with them.

Cosapots do not publish a touch-up procedure. For damage to a Cosapots planter, ask before attempting a repair yourself, since their warranty excludes modifications.

Through the seasons

Fiberglass is non-porous, so the freeze-thaw cracking that ends terracotta does not apply. Both brands publish their planters as frost-resistant. What still matters in winter is water.

• Before winter, check the drainage holes are clear. Water that cannot leave a planter is the problem, not the cold itself. Cosapots note that draining sufficiently matters particularly in regions that reach freezing temperatures.
• Raise the planter off the surface so meltwater is not trapped underneath.
• In spring, check for settled soil and top up, and give the planter its first clean of the year using the method for its brand.
• In summer, water more often rather than more heavily, and check dark finishes in full sun for dust marking.

On roofs, terraces and balconies there is a further consideration: weight. Cosapots state plainly that they are not liable for collateral damage caused by excessive weight on terraces. Our rooftop planter guide covers how that arithmetic works.

When to replace a planter

Rarely, with either brand, and usually for a reason other than failure. A planter that has cracked through, lost structural integrity at the base, or been damaged beyond a touch-up is worth replacing. Fading, minor scuffs and surface marks generally are not: those are what buffing, touch-up kits and a proper clean are for.

If you are choosing between materials in the first place, our guide to the best material for outdoor planters sets out what actually lasts outside and why.

The official documents

These are the manufacturers' own, and they take precedence over anything summarised here:

• Jay Scotts Owner's Guide · planting, cleaning, polishing, maintenance
• Jay Scotts Drainage Hole Guidelines · hole sizes, spacing, self-drilling
• Jay Scotts Warranty · three-year terms and what is excluded
• Cosapots Warranty · five-year terms, cleaning, potting and drainage
• Cosapots Planting Instructions

Jay Scotts also publish a frequently asked questions page and a guide to filling large planters on their own site.

The two ranges

Need help with a specific planter?

If you are unsure which method applies to your planter, or you want drainage added to an order already placed, get in touch. For specification work across a project, our trade page is the faster route.