Too Much Water? Too Little? Here’s How to Know for Sure

Have you ever stood in a garden centre staring at pots labelled only in litres, wondering whether your new plant will actually fit its decorative pot? Or hovered over a thirsty-looking fern thinking, “How much is too much water?” You’re not alone — we hear these questions almost daily. That’s why we created this guide: to take the guesswork out of pot sizing and watering.

Here’s the Problem

You’re shopping and all the pots are labelled in litres — no diameter listed. It’s frustrating when you’re trying to match a plant with a decorative pot, or plan a repotting job at home.

This is confusing because litres only tell you how much soil the pot can hold — not how wide or tall it actually is. Since pots come in all shapes (some are tall and narrow, others short and wide), a 1L pot from one brand might not have the same diameter as a 1L pot from another.

That means you could end up buying a plant that doesn’t fit your decorative pot. It happens countless times — you end up with an oddly sized nursery pot, awkwardly trying to squeeze it into a decorative one. We’ve all been there. It looks off, it’s unstable, and honestly… it ruins the vibe. Or worse, you accidentally choose a pot that’s too small for your plant’s root system.

Our Solution

A simple sizing rule that works every time, plus foolproof watering amounts for each pot size.

Our chart tells you the exact decorative pot size to buy for any plant you pick up. No measuring tape needed, no guessing, no awkward mismatches. Just grab your plant, check our chart, and buy that exact decorative pot size — it’ll fit perfectly every time.

Real-life example

Let’s say you’ve got a decorative pot at home that’s 13cm wide. You head to a garden centre and find a plant in a 1L nursery pot, but there’s no diameter listed. Will it fit? You don’t know — unless you have a size reference chart. Without it, you’re stuck guessing… and potentially wasting time and money.

But here’s the thing — litres are actually incredibly useful too: While diameter helps you match pots, litre size is invaluable when repotting multiple plants. It tells you exactly how much soil you’ll need. If you’re repotting six 3L plants, you know you’ll need about 18L of potting mix — no more guesswork in the garden centre when choosing soil bags.

Plus, once you understand the relationship between pot size and watering needs, litres become your secret weapon for keeping plants happy and hydrated.

Why You Need a Size Guide

This guide helps you:

• Understand the relationship between pot litres and actual dimensions
• Shop with confidence (both online and in-store)
• Avoid mismatches or returns
• Estimate how much potting mix to buy
• Know what fits inside your decorative pots
• Water the right amount for your pot size

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How Much Water Should I Actually Give My Plant?

Do you ever stand over your plant and wonder… “Am I supposed to give it one cup of water? Two? Or just keep pouring until it floods?”

You’re not alone — this is one of the most common questions we get. That’s why we’ve done the math for you.

This guide gives you a general watering guideline based on pot size — so you’ll know roughly how much water your plant should need. Just use a jug or watering can with markings on the side and you’re sorted.

In horticulture, a common guideline is to water with around 10–20% of the pot’s total volume.

Of course, there are always variables:

• Some plants drink more, some less
• Some potting mixes hold water like a sponge
• Others drain fast and need watering more often
• Plants need less water in winter and more during growing season
• Pots with drainage holes will need different amounts than those without

But if you follow this chart, you’ll have a clear starting point — and your soil will get a full, even soak without overwatering. It’s the simplest way to water with confidence (without guessing or drowning your plants).

This ensures the entire root zone is properly soaked — not just the top few centimetres. It also helps flush out excess salts from fertilizers that can build up in the soil over time.

What’s included in your free guide:

• Pot size conversion chart (litres to diameter)
• Watering amount guidelines for each pot size
• Quick tips for avoiding overwatering
• Seasonal watering adjustments
• Drainage hole considerations

👉 Click below to download the guide and start shopping and watering with confidence!