The short version
- Drainage holes: Non-negotiable. Every pot needs them. No exceptions. (See the FAQ for the gravel myth.)
- Terracotta: Best for plants prone to overwatering — succulents, cacti, snake plants, ZZ plants
- Plastic or glazed ceramic: Best for plants that like consistent moisture — calatheas, ferns, peace lilies
- Self-watering pots: Excellent for water-loving plants; avoid for drought-tolerant plants
- Sizing up: Go 1 to 2 inches larger in diameter only; never jump multiple sizes
- Cache pots: Keep the plant in a draining nursery pot; use the decorative pot as an outer shell
Drainage holes: the only truly non-negotiable feature
Before material, size, color, or price: does the pot have drainage holes? This is the most important question. Without drainage, water collects at the bottom of the pot where the roots eventually reach it, leading to root rot. Root rot is silent and irreversible once advanced.
Almost every plant benefit from a pot with drainage holes. The exceptions are extremely limited: bog plants like carnivorous species that naturally grow in waterlogged conditions. Every common houseplant — pothos, snake plant, monstera, calathea, fiddle leaf fig, succulent — needs drainage.
If you love the look of a pot without holes, the solution is simple: use it as a cache pot. Keep your plant in a standard nursery pot with drainage, place that pot inside the decorative outer pot, and remove the inner pot to water it over a sink. Or water in place and empty the outer pot of any water that collects after 30 minutes.
Do not cover the drainage hole with gravel. This is one of the most persistent myths in houseplant care. Adding a gravel layer to a pot without drainage does not create drainage — it raises the water table inside the pot, bringing saturated soil closer to the roots. Use mesh, a piece of coffee filter, or nothing at all. The hole does not need to be covered; a little soil escaping while watering is fine.
Pot materials compared
Terracotta (unglazed clay)
Terracotta is porous. Water and air move through the pot walls, drying the soil from the outside as well as the bottom. This means soil dries faster in terracotta than in plastic or glazed ceramic. This is a feature, not a bug, for plants that prefer to dry out between waterings.
Best for: Succulents, cacti, snake plants, ZZ plants, aloe, haworthia, string of pearls, jade plant, any plant prone to overwatering.
Downsides: Heavier than plastic. Breaks if frozen. Mineral deposits (white crust) build up on the exterior over time and can be scrubbed off. Dries out fast, so you water more frequently in summer.
Terracotta pots are widely available and inexpensive. The classic look suits most plant styles, especially Mediterranean herbs and succulents.
Plastic nursery pots
Lightweight, inexpensive, and effective. Standard black nursery pots retain moisture longer than terracotta because they do not breathe through the walls. Soil dries only from the top and through the drainage hole.
Best for: Calatheas, peace lilies, ferns, philodendron, pothos, monstera, and any tropical plant that prefers consistent moisture.
Downsides: Not attractive on their own. They can degrade and become brittle after years of sun exposure. Roots sometimes spiral aggressively in plastic pots because they hit the wall and keep growing along it.
Most houseplants come home from the nursery in a plastic pot. Many people keep them in these and use decorative cache pots as outer covers. This is a completely valid long-term solution.
Glazed ceramic
Glazed ceramic pots do not breathe through their walls, behaving similarly to plastic in terms of moisture retention. They are heavier and more stable (good for tall plants that tip), and they look more polished. Many come without drainage holes.
Best for: Decorative display, tropicals that like moisture, statement plants that need a nice container. Use as cache pots when they lack drainage holes.
Downsides: Heavy, can crack with impact or extreme temperature change, and often expensive.
Self-watering pots
Self-watering pots have a reservoir at the bottom separated from the soil by a chamber. The plant wicks water up from the reservoir through capillary action as needed. You fill the reservoir every week or two rather than watering from the top.
Best for: Calatheas, maidenhair ferns, peace lilies, any plant that struggles with inconsistent watering or needs constant moisture. Also useful for frequent travelers.
Not for: Succulents, cacti, snake plants, ZZ plants, or any drought-tolerant plant. The constant moisture in the reservoir is exactly the overwatering condition these plants are vulnerable to.
Some self-watering pots come without a traditional drainage overflow. If the reservoir can be overfilled, excess water has nowhere to go and can lead to the same waterlogged conditions you are trying to avoid. Choose models with an overflow indicator or fill carefully.
Fabric grow bags
Fabric pots are breathable and excellent for drainage. They air-prune roots when roots reach the fabric wall, preventing root circling and encouraging a denser, healthier root ball. They are common in outdoor container gardening and vegetable growing.
For indoor use, fabric pots require a saucer or cache arrangement because water drains freely through the sides as well as the bottom. They are not commonly used for ornamental houseplants but work well for herbs, tomatoes, or any plant moved between indoor and outdoor settings.
How to size a pot correctly
Pot size is more important than most people realize. A pot that is too large holds more soil than the plant's roots can absorb water from, leaving wet soil sitting around the roots and inviting root rot.
When to go up
- Roots are growing out of the drainage holes
- Roots are visibly circling inside the pot when you remove it
- The plant dries out within 2 to 3 days of watering, even in appropriate conditions
- Noticeably slowed growth in a plant that is otherwise healthy, well-lit, and fertilized
- The plant is pushing itself up and out of the pot (agave, aloe, large root-ball plants)
How much to go up
Go up 1 to 2 inches in diameter from the current pot. If your plant is in a 4-inch pot, go to a 6-inch pot. If it is in a 6-inch pot, go to an 8-inch pot. Do not skip sizes or jump to a dramatically larger pot. The extra empty soil around the roots holds water the plant cannot yet use.
When not to repot
Some plants perform better slightly rootbound. Spider plants produce more babies when their roots are crowded. Peace lilies bloom more when tight in their pots. Orchids prefer being in much smaller pots than you would expect. Research your specific plant before repotting.
Plant-to-pot material recommendations
| Plant | Best pot material | Why |
|---|---|---|
| Succulents and cacti | Terracotta | Breathes; soil dries fast; prevents overwatering |
| Snake plant | Terracotta or plastic | Terracotta is safer; plastic works if you water infrequently |
| ZZ plant | Terracotta or plastic | ZZ stores water in rhizomes; needs to dry thoroughly |
| Calathea | Plastic or self-watering | Needs consistent moisture; plastic retains water longer |
| Maidenhair fern | Self-watering or plastic | Cannot tolerate drying out; self-watering is ideal |
| Peace lily | Plastic or self-watering | Likes consistent moisture; self-watering reduces maintenance |
| Pothos | Plastic or terracotta | Forgiving; either works; plastic if you tend to underwater |
| Monstera | Plastic or terracotta | Either works; terracotta if you tend to overwater |
| Fiddle leaf fig | Plastic or glazed ceramic | Does not like drying out completely; terracotta dries too fast |
| Orchid | Clear plastic or ceramic orchid pot | Roots need light and air; special orchid pots have slots |
| Jade plant | Terracotta | Succulent; needs to dry out completely |
| Boston fern | Plastic or self-watering | Needs consistent moisture; hates drying out |
Cache pots: the best of both worlds
A cache pot arrangement lets you have an attractive pot without compromising drainage. Keep the plant in a plain nursery pot with drainage holes. Place the nursery pot inside a decorative pot, basket, or vessel without holes. Water the plant in place; after 30 minutes, remove the nursery pot and empty any water that collected in the outer vessel.
Alternatively, place a small saucer inside the outer vessel and let the nursery pot sit on it. Check the saucer every time you water and empty it promptly. Do not let the plant sit in standing water for more than 30 to 60 minutes.
This approach gives you design flexibility while keeping roots healthy. It also makes repotting easier — you just swap the inner pot.
Frequently asked questions
Do plant pots need drainage holes?
Yes, for almost every plant. Without drainage, water collects at the bottom of the pot and the roots sit in saturated soil, which leads to root rot. The only exception is plants in self-watering pots where the reservoir is carefully managed. If you have a decorative pot without holes, use it as a cache pot and keep the plant in a draining nursery pot inside it. Empty the decorative outer pot after watering.
What is the difference between terracotta and plastic pots?
Terracotta (unglazed clay) is porous and breathes, allowing moisture and air to move through the pot walls. This dries out the soil faster, which is ideal for plants prone to overwatering like succulents, cacti, and snake plants. Plastic pots retain moisture longer, which is better for tropical plants that like consistent moisture, such as calatheas, ferns, and peace lilies. Both work fine with any plant if you adjust your watering frequency accordingly.
How do I know when to move a plant to a bigger pot?
Signs it is time to repot include roots growing out of the drainage holes, roots circling visibly around the inside of the pot, the plant drying out very quickly (less than 3 days after watering), or noticeably slowed growth in a plant that is otherwise healthy and well-lit. Go up by 1 to 2 inches in diameter only — oversizing leads to too much wet soil around the roots and root rot.
Can I use a pot without drainage holes if I add gravel to the bottom?
No, and this is a persistent gardening myth. Adding gravel or pebbles to the bottom of a pot without drainage does not create drainage. It actually raises the water table inside the pot, bringing saturated soil closer to the roots. The only correct solution is a pot with drainage holes, or using the pot as a decorative cache around a draining nursery pot.