In Vancouver, repot in March unless the roots cannot wait

In Vancouver the easiest months to repot a houseplant are March, April and May. Repot in that window and the roots take hold in the new soil in about 2 to 3 weeks.

Do the same job in December and those roots can need 6 to 8 weeks. The plant will most likely be fine. It just sits still for longer, and sitting still is when people worry and water too much.

So this guide is about timing. You get the months that are kind to roots, and the signs that say your plant cannot wait. This is when to repot houseplants in Vancouver, and when to leave them alone. The steps are in our older repotting guide, linked below.

When to repot houseplants in Vancouver: the short answer

• Easiest window in Vancouver: March to May, while the light is coming back.
• Roots settle in about 2 to 3 weeks in spring, and 6 to 8 weeks in winter.
• Go up 2 to 5 cm in width, and no more than that.
• Keep the root ball whole about 95 times out of 100.
• Repot in fall only if the roots, the soil or the pot force your hand.

Repotting in fall or spring: is fall a bad time in Vancouver?

It is not bad. It is the slow lane.

Light is what decides when to repot houseplants, and our light drops away fast after the middle of October. At the winter solstice the sun here only climbs about 17 degrees above the horizon. The days are short and plenty of them are grey. You can see the pattern in the climate normals for this coast, the federal record of what our months do.

A plant in fresh soil under that light is slow to fill it. The soil around the root ball stays damp for days, and nothing dries fast indoors in a wet winter.

Damp soil with no roots in it is the usual way a fall repot goes wrong.

So the default answer for October to February is short. Wait. Water less, leave the plant where it is, and put the job on the calendar for March.

The three cases that should not wait until March

Waiting is the default rather than a rule. Three cases are worth doing now, even in the dark months.

The roots have run out of room. The plant dries out in a day, wilts, then perks up an hour after watering.

The old soil has broken down. What is left packs tight, smells sour, and stays wet for days.

The pot is far too small. This shows up on plants from a supermarket. The pot tips over, and water runs straight out of it.

In all three the plant is already losing ground. Six to eight weeks of standing still beats four more months of that. Those three cases are the only exceptions to the rule on when to repot houseplants.

Darrell shows why repotting does not have to be scary in this one.

How do I know if I have a root bound plant?

Slide the plant out of its pot and look. That is the only test that settles it. Nothing settles when to repot houseplants faster than sliding the pot off and finding a root bound plant.

Most people do this on the kitchen floor in November. You slide the pot off, see the roots wound tight, and put the whole thing straight back. That hesitation is what this guide is for.

5 signs your plant needs repotting

• Roots poke out of the drainage hole, or coil across the top of the soil.
• Water runs straight through and out the bottom within a few seconds.
• The plant wilts a day or two after every watering, over and over.
• The pot tips over easily, because the plant is far wider than its base.
• You slide it out and find a solid net of roots with very little soil left.

One sign on its own does not mean much. Three or more together, and the plant has run out of room. Darrell runs through those signs in the short on five clear signs a plant has outgrown its pot.

When a tired plant does not need a new pot

This is worth saying out loud, from a shop that sells pots. Most unhappy houseplants in this city do not have a pot problem.

Most questions about when to repot houseplants turn out to be questions about light. They have a light problem, or a watering habit that no longer matches the season. A plant by a north window in November gets a fraction of the light it had in July.

So check the easy things first. Move it closer to the glass, and water by the weight of the pot rather than by the day. If the plant picks up in three weeks, it never needed a new pot.

Should I repot a plant right after buying it?

Usually not. New plants are where most people get when to repot houseplants wrong. A new plant has just changed light, humidity and temperature in one afternoon. Give it a few weeks in your window before you change its soil as well.

Most growers pot their plants properly. Most of what you bring home has room for another season. Changing everything at once is how a healthy plant ends up sulking for a month.

There is one version of case two that we take seriously. We have opened up plants that sat wet in their shop soil for weeks and found the roots already gone.

So if the soil is heavy and sour and smells like a pond, look at the roots that same day. That is a rescue, and a rescue does not wait for March.

Darrell answers whether a new houseplant really needs repotting in this one.

How much bigger should the new pot be?

Go up 2 to 5 cm wider than the pot it is in now. That is the whole rule. After when to repot houseplants, size is the next question people ask at the counter.

A big jump feels generous and it drowns plants. The extra soil holds water the roots cannot reach yet. In a Vancouver winter it may never dry out at all.

The pot itself is the other half of the job. It needs a real hole in the base. At the counter we usually hand people a pot 2 to 5 cm wider with a drainage hole. It is rarely the big one they came in for.

Clay, glazed ceramic and plastic all behave differently. We wrote that up in our guide on how to choose a pot for your plant in Vancouver. For a pot that lives outside all winter, start with whether ceramic pots can stay outside in a Vancouver winter.

How to repot without killing the plant: should I loosen the roots?

Almost never. About 95 times out of 100 the root ball goes across whole, and we leave it alone. You can get when to repot houseplants right and still lose the plant by pulling the root ball apart.

Teasing roots apart tears the fine feeder roots, and those are the ones doing the drinking. The plant has to grow them back before it can hold its leaves up.

There is one case where we do open it up. If the ball is a solid mat with no soil left in it, water runs around the outside and never soaks in. Then we loosen the outer layer with our fingers, gently, and leave the middle exactly as it is.

The full sequence, pot by pot, is in our older guide on how to repot indoor plants at home in Canada.

If you have a cat or a dog, check the plant on the ASPCA toxic and non-toxic plant list before you start.

Why does my plant droop after repotting?

When to repot houseplants matters, and so does the week after. A droop in the first week or two is common, and usually temporary. The roots are busy finding the edges of the new soil. Leaves are not the priority right now.

Water once, properly, until it drains from the bottom. Then stop and watch. Yellow leaves most often mean the plant went too dry. Brown, soft leaves most often mean the soil stayed too wet. Those two get mixed up constantly, and the fix for one makes the other worse.

Three more things help through the cold half of the year. Stop feeding from November to February, because the plant cannot use it. Keep indoor humidity around 40 to 60 percent once the heating comes on. Water by weight rather than by day, which we cover in our lesson on winter watering for houseplants.

Darrell keeps the aftercare short in the short on watering, waiting and watching. If the plant is still unhappy a month later, read why houseplants die after repotting.

The part of this that is not about roots

The real question behind when to repot houseplants is often not about roots at all. Nobody wants soil across the kitchen floor on a wet November evening. So the plant stays in a pot it has outgrown, and the job slides to next month.

Many people tell us that looking up from a screen to something green is the one break their eyes get all day.

The money side is quiet and real. A plant and a pot that suits it cost less than most things people buy to lift a room. They last for years. A plant that dies in the wrong pot is the expensive version.

A small 2015 study found that working with plants can calm the body’s stress response. It was a small piece of work, so hold the 2015 study on plants and stress lightly. People tell us that ten minutes with their hands in soil on a dark Tuesday beats ten minutes on a screen.

A room you want to come home to changes the evening. That is not science. It is what we hear at the counter in February.

What comes with a pot from DH Garden Centre in Kitsilano

Plenty of people would rather not do any of this at home. It is the part we do all day anyway.

If you buy a pot from us, we repot it at the counter and the soil is on us, up to 5 litres. There is no extra charge for the repotting. Here is what else comes with it.

• Someone at the counter matches the pot to your plant and to the light in your room. Bring the plant, or a photo of it and the corner it stands in.
• More shapes and glazes than we have shelf for. Darrell picks them himself in Bat Trang and Binh Duong, so the same pot is not in every store in the country.
• The plant goes home already settled, with watering notes for our light and our rain.
• You can bring the plant in any day we are open, 11:00 AM to 6:30 PM. No appointment needed.
• Pots priced fairly for what they are. You can see that on the shelf, not on a screen.

A healthy plant in a pot it has outgrown still looks like something you bought last week. In a pot that fits, it looks like it lives there.

If you would rather not decide when to repot houseplants on your own, that is what the counter is for. You can see how the repotting happens before you leave the shop.

Darrell Smith co-founded DH Garden Centre. Most of what is written above comes from plants that arrived at this counter looking tired.

For the rest of it, take the free Vancouver Plant Care and Repotting Guide. It comes by email and it was written for our light and our rain. Repotting is one piece of a room that feels good in winter. The rest is in our guide to a green corner at home in Vancouver.

Or come and see the pots on the floor in Kitsilano and hold a few of them. Size is much easier to judge with your plant standing next to the pot.

Frequently asked questions

Can I repot houseplants in winter in Vancouver?

Yes, but only when there is a reason. The usual answer to when to repot houseplants here is March to May. In our low winter light the roots need roughly 6 to 8 weeks to settle, against 2 to 3 weeks in spring. Repot now if the plant is root bound, if the soil has gone sour, or if the pot is far too small.

How often do houseplants need repotting?

Most houseplants need a new pot when the roots run out of room. So when to repot houseplants is a question about the plant rather than the calendar. Fast growers go sooner, and slow ones like snake plants can sit happily for years. Roots out of the drainage hole, water running straight through, and daily wilting are the tests.

Does a bigger pot make a plant grow faster?

No, and it often does the opposite. Soil with no roots in it holds water for a long time. Roots sitting in cold wet soil rot instead of growing. Going up 2 to 5 cm gives the plant fresh soil it can actually use within a few weeks.

Do I need new soil, or can I reuse what is in the pot?

Use fresh potting mix for the new space around the root ball. Old mix has already broken down, it packs tight, and it holds water in exactly the way you are trying to avoid. Keep the original root ball intact, and let the new mix fill the gap around it.

Visit us in Kitsilano

DH Garden Centre
3742 W 10th Ave, Vancouver, BC V6R 2G4 (Kitsilano)
Open daily 11:00 AM to 6:30 PM
Phone (604) 929-7335
Directions: https://www.google.com/maps/search/?api=1&query=DH+Garden+Centre+3742+W+10th+Ave+Vancouver
YouTube: https://www.youtube.com/@dhgardencentre