Plant Pot Size Guide | Find the Best Shape and ...

Author: Hou

May. 13, 2024

Plant Pot Size Guide | Find the Best Shape and ...

Does pot shape and size affect the growth and health of plants? Yes, it does, is the short answer. Here’s the long answer to choosing the best pot for your plant and nailing your landscape design.

If you want to learn more, please visit our website planting tray large.

Just like a home is to a person, a pot is a plant’s sanctuary. It’s a place of refuge, where it can thrive and flourish. Therefore, matching your cherished plant with the appropriate pot is not trivial, but a crucial aspect that deserves thoughtful consideration.

Understanding the significance of containers can be daunting, given the vast range of available options. Various materials, shapes, sizes, colors, styles, and weights of flower pots significantly impact the plants housed within them. To simplify, we’ve put together a detailed guide to help you select the best shape and size for your next planter!

What does plant size mean?

You may have seen plants described in sizes, such as inches or gallons. This does not refer to the actual plant itself. In this context, inches refer to the diameter of the pot the plant came in, while gallons pertain to the container's volume.

Take, for example, a 10” plant, which is a plant growing in a 10” diameter pot, typically around 2.5 to 3 gallons.

Most pots generally follow a sizing system that increases by 2” increments – starting from 2”, then 4”, 6”, and so forth. The range is extensive, with some of our products reaching up to 60 inches in size.

Houseplants usually reside in smaller-sized pots, making it convenient to move them around and place them on shelves or tables.

For container gardening with outdoor plants, the pots will need to be larger to ensure stability against wind and various outdoor conditions.

What pot size do I need?

Size Matters

The bottom line is that size matters when selecting the right pot for your plant.

What happens when planters are too big?

Evidence suggests that doubling a pot size can lead to a 40% increase in some plants' growth. Maintaining proper water levels, nutrients, and soil mix is vital for plant health.

However, if the container is too large and has poor drainage, the soil may dry slowly, leaving roots damp and prone to rot. Conversely, with insufficient watering, the larger soil volume may become excessively dry.

A too-large planter can also negatively impact the aesthetics from a proportional perspective.

What happens when planters are too small?

On the other hand, placing your plant in an overly small pot isn't ideal either. A pot that is too small can lead to the plant becoming root-bound, which can result in slow or stunted growth. Large plants or trees may topple easily if their pots are too small.

Another factor to consider is the perched water table effect.

What is a perched water table?

The phenomenon of the perched water table is crucial when deciding on your planter’s shape and size. At the bottom of each pot, a soil layer will always remain drenched in water, which won't drain due to gravitational forces being countered by the soil’s capillary pull.

This water can only be used by the plant or evaporate. If the pot is too small or the plant’s roots are near this water table, it can harm the plant.

What is the optimum planter size?

Planters come in various sizes. Our fiberglass planters range from 10 inches to 60 inches in diameter. The right pot size depends on the plant type and the number of plants.

For serious container gardening, consider these guidelines:

Plant a 10-inch container with small fruits and small herbs:

  • 1 strawberry plant
  • Small herbs like chives, parsley, mint, or sage
  • 1 to 3 annuals

Plant a 14-inch container with leafy vegetables and larger herbs:

  • 4 pea plants
  • 1 leaf lettuce, spinach, cabbage, or arugula
  • Larger herbs like rosemary or lavender
  • 3 or 4 annuals

Plant a 16-inch container with larger fruit plants and small trees:

  • 4 to 6 annuals
  • 1 small shrub
  • 1 dwarf citrus tree
  • 1 bushy fruit tree like raspberry or blueberry

Plant an 18-inch container with larger vegetables and groups of herbs:

  • 1 broccoli, cauliflower, eggplant, tomato, or pepper plant
  • Mix of herbs
  • Mix of annual flowers

Plant a 24-inch container with medium-sized trees and shrubs:

  • 1 cucumber or summer squash
  • 1 fig tree, dwarf peach tree, or nectarine tree
  • 1 decorative shrub like a hydrangea
  • 1 evergreen shrub

Plant a 30-inch container with the big boys:

  • 1 orchard fruit tree like apple, pear, or cherry plum
  • 1 sweet corn
  • 1 pumpkin, rhubarb

What do I do when my plant gets too big?

As your plant grows, you may need to repot it every year or two. For optimal results, choose a pot that is 1-2” larger than the current pot size. If the container is 10” or bigger, go for a pot that is 2-4” larger.

Gardening lingo – Transplanting a plant to its first proper container or upgrading it from a smaller pot to a larger one is termed ‘potting up’.

Does plant pot shape matter?

Yes and no. While the exact shape is not the most critical factor for container gardening, it impacts how you can arrange and maintain your garden.

The different shapes of pots for plants

Square containers

Square containers like the Kathryn Square Tapered Planter allow for neat arrangements and work well as pathway or entrance decorations. Their shape simplifies watering, reducing gaps between planters where water might escape.

A square pot offers more volume and surface area for planting than a round pot of the same height. This extra space is ideal for growing rows of flowers or cultivating herbs.

Rectangular containers

Rectangular planters such as the Jay Scotts Torino Rectangular Planter are prized for their practicality. Their shape is perfect for planting even rows of flowers, vegetables, or hedges. Ensure you drill holes in the back for proper drainage.

Round containers

Round planters are popular for herbs, vegetables, and smaller plants, boasting diverse design applications. However, they are less practical for larger plants due to stability issues and the challenge of even growth. The Alzira Bowl Planter, known for its modern, stable design, is a favorite.

If opting for larger plants in round designs, avoid tapered bases to prevent stability issues.

Some argue that round pots encourage circling roots, but this is less of an issue with appropriately sized pots.

Tall pots or small pots?

According to the perched water table theory, tall pots are generally better due to their favorable air-to-water ratio and improved gas exchange. For most plants, a tall and wide pot, rather than tall and narrow, suits various watering needs.

Exceptions exist, such as succulents and cacti, which prefer shallow containers due to their root structure.

For decorating tips with tall planters and more information, please visit planting trays wholesale.

Check out how we use Jay Scotts planters to add different-shaped potted plants around a hotel’s pool deck, creating a lush, tropical atmosphere.

The Gates South Beach

The pool area is often the first thing guests see upon arrival. We used planters to achieve a luxurious, inviting look for this property. Read more View Project

Does my planter need holes for drainage?

Drainage is crucial for potted plants. Containers with bottom holes are preferable, allowing you to fine-tune watering for each plant. Containers without drainage holes should only be used if you’re very familiar with the plant's water needs.

Drainage holes help excess water escape, reducing root rot risk. Use a saucer underneath to catch any water leakage.

How planter thickness can make or break your plants

Another aspect of plant pot size to consider is the pot’s thickness. Thick containers shield plants from extreme outdoor temperatures, acting as insulators to moderate sudden temperature swings.

Our fiberglass planters are crafted from thick fiberglass sheets to ensure plant health. Additional layers of fiberglass enhance durability and strength, ensuring your planters remain reliable.

The best shapes and sizes of Jay Scotts planters

Our diverse range of planters suits any project, from home gardens to commercial use. Here’s a brief guide:

Round planters are ideal for both small and large bushy plants. They’re especially attractive in commercial spaces with shrubs or decorative hedges.

Cube pots provide a stable base for trees and top-heavy plants. Their straight lines complement long, straight plants if interior design is your focus.

Rectangular planters come in varied sizes, suitable for shrubs, bushes, and flowers. They effectively create dividers in both commercial and residential areas.

See Jay Scotts Planters in action!

Check out our project for Pura Vida, a Miami-based restaurant. The challenge was to design a private patio that attracts diners while providing a tranquil experience inside. Our solution involved utilizing planters to create the desired atmosphere.

Pura Vida Las Olas, Miami

This project involved crafting a space that offers street-side privacy yet feels open and refreshing. Our planters provided the perfect solution. Read more View Project

Jay Scotts rectangular pots are excellent for hedges, offering organic privacy screens in offices. They can also outline specific areas like queue lines or relaxation zones.

We hope this guide emphasizes the importance of choosing the right planter. Choosing the right brand is the easy part. At Jay Scotts, we pride ourselves on our fiberglass planters, known internationally for their quality.

If you want to know why we chose fiberglass for our planters, check out our material comparison guide, or contact us about becoming a wholesaler—we welcome all questions!

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