Why Unusual Containers Work

There is something quietly satisfying about a plant living in something that was never meant to hold soil. A teapot missing its lid, a biscuit tin from a car boot sale, a Kilner jar that has lost its rubber seal — each has a shape and a history that a plain terracotta pot simply cannot match. Grouped together on a windowsill or a kitchen shelf, these oddments turn a corner of the house into a small cabinet of curiosities, and most houseplants adapt to them surprisingly well.

The catch is that household objects were designed for tea, biscuits and jam, not for compost and water. Treat the switch as a small engineering project rather than a straight swap, and you will end up with something charming that lasts for years instead of something that wilts within a fortnight.

Drainage Comes First, Always

Almost every problem with unusual planters traces back to water with nowhere to go. Roots that sit in a soggy pocket of compost will rot, and no amount of careful watering will save them once that begins. You have three sensible options.

• Drill a hole. A diamond-tipped bit will cut through ceramic and glazed stoneware, whilst metal tins need a centre punch and a firm hand — expect the base to buckle slightly. Work slowly and let the bit cool.
• Use the pot-in-pot method. Keep the plant in an ordinary plastic nursery pot and stand that inside the decorative container. Lift it out to water, let it drain in the sink, then put it back. This is by far the safest route for anything sentimental or valuable.
• Water with precision. If neither is possible, measure rather than guess. Fifty millilitres at a time, wait ten minutes, then check whether the compost is damp an inch down before adding more.

One myth worth retiring: a layer of gravel in the base does not create drainage. Water simply collects above it and raises the saturated zone closer to the roots, which makes things worse rather than better.

Teapots, Jugs and Tins: Kitchen Characters

Teapots are the classic entry point, and the spout gives you a ready-made drainage channel if you tip the pot slightly when watering. Small teapots suit African violets, tiny ferns and succulents such as Echeveria, which prefer their roots to dry out between drinks. Remove the lid and the opening becomes a natural place to tuck a trailing plant.

Biscuit tins are deeper than they look, which makes them good homes for peace lilies, spider plants and button ferns. The enemy is rust. Line the inside with a couple of coats of enamel paint, or better still, drop in a plastic pot and treat the tin purely as a cachepot. Enamel jugs, old coffee pots and vintage storage jars all work on the same principle: metal plus constant moisture equals corrosion, so keep the compost away from the metal itself.

Do check the weight before you commit. A large ceramic container filled with damp compost can be surprisingly heavy, and a shelf bracket that held a few paperbacks may not hold that.

Glass Jars, Bottles and Transparent Containers

Glass is beautiful because you can see the roots and the layers of compost, but it brings two complications. The first is algae: light passing through the sides encourages a green film to form on the inside within weeks. You can slow this by lining the jar with moss or a sleeve of hessian, or by cleaning it monthly with a soft bottle brush. The second is heat. A clear glass vessel on a south-facing sill acts like a small greenhouse, and midday sun in July can cook tender roots. Position glass containers where they receive bright but indirect light.

Kilner jars and sweetie jars are lovely for ferns and moss, which enjoy the humid microclimate. Tall bottles and narrow-necked vessels are ideal for propagation cuttings, and there is no shame in using them for nothing more ambitious than that.

Matching the Plant to the Container

Shape matters as much as material. Trailing plants such as devil's ivy, Tradescantia and string of pearls look best spilling over the rim of a tall jug or tin, where the height of the container balances the length of the stems. Shallow vessels — teacups, sugar bowls, egg cups — belong to succulents, which have compact root systems and hate being wet.

Humidity-lovers like Boston ferns and maidenhair ferns thrive in deep tins and jars, but they need shade and a regular misting. Orchids are the exception to almost every rule: they detest sitting in moisture, so a jar should be a cachepot only, with the plant in its own bark-filled pot. Small containers dry out quickly, so choose compact plants and expect to water little and often rather than deeply and rarely.

Keeping Unusual Planters Looking Good

A few habits will keep your collection thriving. Use a free-draining houseplant compost with perlite or bark mixed through, and add extra grit for succulents. Rotate each container a quarter turn every week so growth stays even, and flush the compost through with plain water every few months to wash away the white crust of mineral salts that builds up on the surface.

Repot every twelve to eighteen months, because small volumes of compost exhaust themselves quickly. Check metal containers for rust and glass for algae as part of your weekly watering round, and deal with both straight away. Small adjustments, made often, are what keep a slightly eccentric windowsill looking intentional rather than neglected.

Above all, enjoy the hunt. The best containers are rarely bought for the purpose — they are the ones you almost threw away, then suddenly saw in a different light.