Collection: Planters & Pots

The pot decides how often you water

A pothos in a 4 inch (10 cm) pot on a sunny sill wants water about twice a week. Move the same plant into an 8 inch (20 cm) pot and it is sitting in roughly eight times the soil, which can go ten days between drinks. The plant did not change. The container did, and the container is what you are actually choosing.

Two properties do most of the work: how much soil the pot holds, and whether its walls let water out. Terracotta is porous, so it dries the root ball from the sides as well as the top. Glazed ceramic, plastic and metal are sealed, so the only exits are the surface and the drainage hole. That single difference is why the same watering habit rots a fern in one pot and leaves it thirsty in another.

So pick the pot around two things you already know: the plant, and the light in the room it will live in. A sun facing window and a porous pot forgive heavy watering. A north facing corner and a glazed pot do not.

What size pot does your plant actually need

The nursery rule is one to two inches (2.5 to 5 cm) of fresh soil around the root ball, and no more. Under 10 inches of plant, step up one inch in diameter. Above that, two.

Jumping three sizes at once is the most common way to kill a healthy houseplant. The roots cannot reach the outer ring of soil for months, that ring stays saturated for a week after each watering, and rot starts in the part of the pot the plant never touched. Pot sizes are quoted as the diameter across the top rim, not the height, which is worth knowing before you order anything by number alone.

Drainage, and the pot with no hole in it

A hole in the base is the difference between a pot and a bowl. Without one, every drop you pour stays until it evaporates, and the bottom inch of soil becomes a reservoir the roots have to sit in.

The gravel layer everyone recommends does not fix this. Water will not cross from fine soil into coarse gravel until the soil above is completely saturated, so a gravel layer lifts the wet zone closer to the roots instead of draining it away. If a pot has no hole, either drill one with a masonry bit at low speed with water running on the glaze, or stop planting into it and use it as a sleeve.

Used as a sleeve, a hole free pot is genuinely useful. The plant stays in its plain nursery pot, you lift it out, water it at the sink, let it drain for five minutes and put it back. Nothing sits in runoff, and you can swap the plant out in seconds when it outgrows the spot. A saucer does the same job for a pot that drains: catch the runoff, then empty it within half an hour rather than letting the pot stand in it.

Terracotta, glazed ceramic, plastic or concrete

Material is not a finish decision. It sets how fast the soil dries, how much the pot weighs once it is full, and whether it survives a winter outdoors.

Why succulent pots are so small

A 2 inch echeveria in a 6 inch pot looks better on the shelf and is far more likely to die. Succulent roots are shallow and spread sideways, so the deep column of soil under them never dries, and the plant rots from the base while the leaves still look fine.

Match the pot to the plant, not to the shelf. A rosette wants a pot about half an inch wider than its own spread and no deeper than it is wide. If you want presence, group several small pots rather than moving one plant into a large one. Three pots of different heights in a row read as deliberate; one lonely succulent in a wide bowl reads as a mistake.

Cleaning a pot before you plant in it again

Two things build up on a used pot, and they need different treatment. The white crust is mineral salt from fertilizer and hard tap water, left behind as the water evaporates through the clay. The invisible problem is what the last plant left: fungal spores and bacteria survive on a dry pot for months, and damping off in a tray of seedlings usually comes from the container rather than the seed.

For the crust, soak in one part white vinegar to three parts water for half an hour, then take a stiff brush to it. For anything that had a sick plant in it, follow with ten minutes in one part household bleach to nine parts water, then rinse well. Terracotta soaks up whatever it sits in, so rinse it twice and let it dry all the way through before planting, since a bone dry pot will otherwise pull moisture straight out of fresh soil.

Do this at the end of the season rather than the start. A stack of pots that came in from the garden in October cleans in twenty minutes while the soil is still soft, and turns into an afternoon of scraping by March.

When to repot, and when to leave it alone

Four signs say the pot is finished: roots pushing out of the drainage hole, water running straight through in a few seconds, the plant drying out within two days of watering, and soil that has shrunk away from the wall so water runs down the gap instead of soaking in.

Early spring is the moment, because the plant is about to put on growth and will fill new soil rather than sit in it. Do not repot the week you bring a plant home. It has just changed light levels, humidity and temperature, and giving it two to four weeks to settle first costs you nothing. Some plants also flower better slightly root bound, so a peace lily or a hoya that has stopped blooming does not necessarily want more room.

Most houseplants want this every 12 to 18 months while young, then every two to three years once they reach the size you want them at. After that you refresh the top two inches of soil each spring and leave the roots alone.

You are buying a volume, not a silhouette

Everything above comes back to the same measurement. A pot is a measured amount of water held next to a set of roots, and the shape you like is a wrapper around that quantity. A tall narrow pot and a low wide one of the same diameter hold very different amounts, and the plant answers to the amount.

Which is also why a pot outlives its first occupant. The plant you buy it for will double, stall or die, and the pot will still be there. Buy the volume you will keep using, in a material that suits the room it stands in, and the next plant fits in without another purchase.