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Plastic plant pots dimensions and uses

LIGHTWEIGHT PLANT POTS

9cm Round Lightweight Plant Pots
Dimensions: 9cm diameter top and 7cm depth. Capacity: 0.29 litres. Recommended use: For pot bedding and young plants.

11cm Round Lightweight Plant Pots
Dimensions: 11cm diameter top and 8.8cm depth. Capacity: 0.52 litres.
Recommended use: For pot bedding and young plants.

HEAVYWEIGHT PLANT POTS

6cm Round Heavyweight Plastic Plant Pots
Dimensions: 6cm diameter top, 4.4cm diameter base and 5.8cm depth. Capacity: 0.12 litres.
Recommended use: For pot bedding young plants and for cacti and succulents

9cm Round Heavyweight Plastic Plant Pots
Dimensions: 9cm diameter top, 6.3cm diameter base and 8.7cm depth. Capacity: 0.37 litres. Recommended use: For pot bedding and young plants.

12cm Round Heavyweight Plastic Plant Pot
Dimensions: 12cm diameter top, 7.7cm diameter base and 10.7cm depth. Capacity: 0.735 litres. Recommended use: For pot bedding and young plants.

CONTAINER PLANT POTS

1 Litre Plant Pots
Dimensions: 13.2cm diameter top, 10cm diameter base and 10.4cm depth.
Capacity: 1 litre.
Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot.

1.5 Litre Plant Pots
Dimensions: 15.1cm diameter top, 11.2cm diameter base and 11.9cm depth.
Capacity: 1.5 litres.
Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot.

2 Litre Plant Pot
Dimensions: 16.7cm diameter top, 12.5cm diameter base and 13.2cm depth.
Capacity: 2 litres.
Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot.

3 Litre Plant Pots
Dimensions: 19cm diameter top, 14cm diameter base and 15cm depth.
Capacity: 3 litres.
Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot.

4 Litre Plant Pots
Dimensions: 21cm diameter top, 15.5cm diameter base and 17cm depth.
Capacity: 4 litres.
Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot.

5 Litre Plant Pots
Dimensions: 22.5cm diameter top, 16.5cm diameter base and 18cm depth.
Capacity: 5 litres.
Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot.

7.5 Litre Plant Pots
Dimensions: 26cm diameter top, 19.8cm diameter base and 21cm depth.
Capacity: 7.5 litres.
Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot.

10 Litre Plant Pots
Dimensions: 26cm diameter top, 23.8cm diameter base and 22cm depth.
Capacity: 10 litres.
Recommended use: Container pots used for shrubs, herbaceous and climbers’ examples: poinsettia & large cyclamen. These can be used for potting on as the plant matures and needs a bigger pot.

SQUARE PLANT POTS

9cm Square Plant Pot
Dimensions: 9cm diameter and 9.5cm deep. 489ml volume.
Recommended use: Alternative pots for space efficiency or decoration

10cm Square Plant Pot
Dimensions: 10cm diameter and 17cm deep. 1.4L volume.
Recommended use: Alternative pots for space efficiency or decoration

13cm Square Plant Pot
Dimensions: 13cm diameter and 18cm deep. 2.4L volume.
Recommended use: Alternative pots for space efficiency or decoration

HEAVY DUTY CONTAINER PLANT POTS WITHOUT HANDLES

12 Litre Plant Pots
Dimensions: 30cm diameter top, 24.2cm diameter base and 23.8cm depth.
Internal top diameter 27.5cm.
Capacity: 12 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

15 Litre Plant Pots
Dimensions: 32.8cm diameter top, 25.5cm diameter base and 25.8cm depth.
Internal top diameter 30cm.
Capacity: 15 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

20 Litre Plant Pots
Dimensions: 35.5cm diameter top, 27.6cm diameter base and 26cm depth.
Internal top diameter 32.5cm.
Capacity: 20 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

25 Litre Plant Pots
Dimensions: 38.5cm diameter top, 30cm diameter base and 27.7cm depth.
Internal top diameter 35cm.
Capacity: 25 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

HEAVY DUTY CONTAINER PLANT POTS WITH HANDLES

30 Litre Plant Pots
Dimensions: 40.8cm diameter top, 29.8cm diameter base and 33cm depth. Internal top diameter 36cm. Capacity: 30 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

35 Litre Plant Pots
Dimensions: 44cm diameter top, 31.8cm diameter base and 37cm depth. Internal top diameter 40cm. Capacity: 35 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

43 Litre Plant Pots
Dimensions: 50cm diameter top, 35.5cm diameter base and 35.5cm depth. Internal top diameter 45cm. Capacity: 43 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

50 Litre Plant Pots
Dimensions: 50cm diameter top, 35.2cm diameter base and 40.5cm depth. Internal top diameter 45cm. Capacity: 50 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

60 Litre Plant Pots
Dimensions: 55cm diameter top, 41cm diameter base and 37.5cm depth. Internal top diameter 50cm. Capacity: 60 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

75 Litre Plant Pots
Dimensions: 55.5cm diameter top, 39cm diameter base and 48.2cm depth. Internal top diameter 50.5cm. Capacity: 75 litres.
Recommended use: Heavy duty plant pots used for tree production and growing

80 Litre Plant Pots
Dimensions: 60cm diameter top, 42.2cm diameter base and 43cm depth. Internal top diameter 54cm. Capacity: 80 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

90 Litre Plant Pots
Dimensions: 59.5cm diameter top, 42.8cm diameter base and 48cm depth. Internal top diameter 55cm. Capacity: 90 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

100 Litre Plant Pots
Dimensions: 60.5cm diameter top, 43.5cm diameter base and 52cm depth. Internal top diameter 55.5cm. Capacity: 100 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

125 Litre Plant Pots
Dimensions: 64cm diameter top, 46.3cm diameter base and 53.5cm depth. Internal top diameter 59.5cm. Capacity: 125 litres.
Recommended use: Heavy duty plant pots used for tree production and growing.

130 Litre Plant Pots
Dimensions: 69cm diameter top, 52cm diameter base and 51cm depth. Internal top diameter 65cm. Capacity: 130 litres. Recommended use: Heavy duty plant pots used for tree production and growing.

GIANT ROUND PLANT POTS

We also offer a very competitive range of giant plastic plant pots. These are more specialised and ideal for larger specimen plants, bamboos and trees. They are extremely strong made from recycled black rubberised plastic and are very sturdy. The pots are pre-drilled with drainage holes in the sides and base and are generally wider than they are deep providing the stability required for larger plants. When planted, these pots are left in situ hence no handles.

These giant plant pots are available in the following sizes.
160 litre 80cm Diameter x 51cm Height
210 litre 80cm Diameter x 55cm Height
230 litre 85cm Diameter x 55cm Height
285 litre 95 cm Diameter x 55cm Height
350 litre 95cm Diameter x 73cm Height
500 litre 103cm Diameter x 80cm Height
600 litre 120cm Diameter x 68cm Height
750 litre 120cm Diameter x 78cm Height
1000 litre 140cm Diameter x 90cm Height
1500 litre 155cm Diameter x 100cm Height

We hope you have found this pot guide helpful! Don’t forget we have an expert Customer Services Team available on 01903 258 200 to offer advice on all our pot sizes and dimensions.

Expert gardening advice from a team of professional gardeners and horticulturists.

Plant Pot Sizes: The Complete Guide

Why are there so many different pot sizes on the market?

Nurseries sell plants at different stages of growth. Most are grown in the ground and then transferred into a pot. Thus a 1 year old tree may be transferred into a 9L pot, a 3 year old tree into a 18L pot. Others are transferred from pot to pot, from a 3L to a 9L for example.

Thus a tree may start out in the ground, before being transferred to a 9L and then a 15L, and so on. A nursery may start out with 300 trees and sell 150 bare root, 100 9Ls and 50 15Ls. Although, not all nurseries do this. Thus a tree may remain in a pot it was initially transferred to.

Different nurseries sell their plants at different stages of growth and use different size pots. This increases the number of pot sizes on the market.

Is pot size a good measure of value for money?

No. You don’t want a larger pot of soil, but a healthy tree with a well established root system and lots of growth. Thus, you should look at the height on arrival and the age of a tree. For larger tree sizes, looking at a tree trunk’s girth is a good measurement of value.

One particular pot size may seem very competitive in comparison to another, but this does not mean you are getting better value. Some nurseries set up complicated irrigation and fertiliser systems ensuring trees receive the best possible nutrients, while others do not go to such lengths.

Similarly, the age of a tree is not the be all and end all. A well fed tree will grow faster than a poorly fed tree. This is why you look at the height on arrival also.

Are smaller or larger pots better value for money?

The younger the tree you purchase the easier it will establish and easier it will be to train. The older the tree you purchase the greater the instant impact it will make and the less you will have to wait for fruit.

Why are 9cm pots not marketed in litres?

Interestingly, 9cm refers to the pots diameter, as opposed to height. All pots smaller than 1L are listed this way, probably because receiving a 0.43L pot sounds a bit rubbish.

Are all trees supplied in pots?

Trees can be sent from late autumn to early spring when they are dormant without any soil – these trees are known as bare root. Potted trees can be transferred anytime in the year, although are best purchased and planted in the colder months as to avoid water stress.

9cm Pot

The smallest pot size available. Plants supplied are usually herbs and shrubs. Many hedging plants are sold this way, allowing you to grow a hedge on the cheap.

2-3L Pot

Climbing plants, both fruiting and ornamental, as well as shrubs are sold at this size.

Roses are sold at this size as their roots grow deeper than other shrubs.

The smallest pot size, you’ll likely be able to buy a tree at.

9-12L Pot

The standard size for 1-3 year old trees. Trees are transferred into this larger pot size, either from the ground or 3L pots.

As young trees are transferred to these larger pots after the bare root season ends in spring, buying in Autumn is recommended, when the tree has adapted to the pot and had more time to grow. A downside of this is that some varieties may have sold out by this point, so for lauded trees buy early!

This is the first size standards are available at. Standards have a portion of the trunk cleared of stems for ornamental value.

Trees above this size are marketed as producing an instant impact.

15-100L

Trees are available in a large number of pot sizes in this range – 15, 18, 25, 30, 45, 50 and so on – with larger pots containing older, more mature trees. The greater the maturity, the greater the instant impact.

Fully grown trees are supplied at this point and at great cost, due to the cost of delivery and years in the nursery.

Approximating Plant Pot Sizes

Litres are difficult to approximate without prior knowledge. Below, you can see our infographic of the relative size of different litre plant pots.

Calculating Plant Pot Sizes

Comparing plant pot sizes is difficult as they vary in shape by manufacturer. At small sizes plant pots are flat-topped cones, while larger sizes are more structurally stable cylinders. This is why we recommend you calculate a pot’s litreage yourself.

Most plant pot sizes are measured in litres, which is a measure of volume, calculated from a shape’s cubic centimetres. A cylinder’s cubic centimetres is calculated from the equation πr 2 h. Thus to calculate you plant pots literage, you need to measure your pot’s height and radius with a ruler. If your plant pot isn’t an exact cylinder, but a flat-topped cone, it is best to approximate calculating a cylinder.

If your pot is a square or rectangle, calculating the cubic centimetres is easier. Simply, multiply the height by the width by the diameter.

Now you have calculated the cubic centimetres of you pot, simply divide by a thousand to arrive at litres.

Too complicated? Below you can see the measurements of various cylindrical pots that were visualised in the above infographic. In our calculations we have presumed the radius is two/thirds of the height.

In the table, you can see that a 3L pot is 44% larger than a 1L pot. Luckily, a cylindrical 3L pot will always be 44% larger than a 1L pot, regardless of the ratio of radius to height.

From the table, you can calculate how much larger a 25L pot is to a 1L pot by calculating percentage change. Simply minus the old height from the new height, then divide by the original height and then multiply by hundred. ((26.16-9)/9) x 100. Thus the percentage change is 190.67%.

We know this is correct as if we multiply 9 by 2.9067 (converting the percentage to a decimal) we arrive at 26.16.

Jorge works in the Primrose marketing team. He is an avid reader, although struggles to stick to one topic!

His ideal afternoon would involve a long walk, before settling down for scones.

Jorge is a journeyman gardener with experience in growing crops.

Why are there so many different pot sizes on the market? Is pot size a good measure of value for money? And learn how to calculate the perfect pot size!