You can flex your green thumb in any outdoor space you have, whether it's a windowsill, balcony, deck, patio or porch.

It doesn't take a lot to start a container garden - you just need plants, soil, water and some containers to put them in.

Plus, we've gathered some experts to hear their best advice on common and not-so-common containers that will help you make your garden look stunning.

1. Clay planters

Many budding gardeners start with the classic terracotta planter. No matter the size, you can't go wrong with terracotta pots; they are both beautiful and practical.

All-white flowers, such as forget-me-nots, stand out in terracotta pots of all sizes.

"Clay containers have a classic good look and come in a variety of sizes at reasonable prices," says Maggie Stuckey, author of the book "Container Victory Gardens." "The material is porous and allows air to pass through and reach the roots."

If you go the clay pot route, there's a downside.

"The soil dries out quickly," Stuckey adds, "because water vapor can easily pass out through the porous sides. So water regularly, especially when the weather gets hot.

2. Baskets

When you think of gardening containers, baskets may not immediately come to mind. But woven wicker baskets can provide a rustic contrast to delicate flowers.

"Experiment with various combinations of sizes, shapes and weaves," suggests David Andre, landscape designer at Sprouted Home.

Baskets do decompose after a few seasons of contact with moist soil. But you can make your baskets last longer by not putting the soil in direct contact with the canes. Instead, try tucking some small pots into the basket.

"Or fill the basket with a plastic bag, then they can hold moisture-loving plants very effectively," Andre says.

3. Aluminum buckets and jugs

These spiny purple foxgloves look great in a simple galvanized farm bucket.

"If you're going for an industrial or farmhouse aesthetic," says Andre, "aluminum buckets and kettles can be your ally." The silvery sheen contrasts with the green foliage and vibrant flowers, creating a striking visual appeal. In addition, they're sturdy and weather-resistant."

4. Upcycled furniture

Painted furniture is a common prop in Instagram container gardens, and for good reason.

"Old benches and tables," says Andre, "can serve as pleasant, quirky pedestals for your planters, while providing height and depth to your arrangement." When painted, they will add a pop of color and a personal touch to your garden space."

Keep an eye out for cheap junk at garage sales and thrift stores, or keep an eye out for free items in your local "don't buy anything" Facebook group. Look for small tables, stools, chairs, and even ladders.

And don't overlook that "brown furniture" that's no longer popular. It may just need a fresh coat of paint. Paint any mismatched furniture the same color to bring them together.

4. Stone planters and bowls

Stone and concrete planters and bowls are a favorite among gardeners because they can stand up to the elements.

If you have a large pot, mix three or four different sizes and colors of plants. And make sure at least one is a trailing plant that can overflow and look romantic.

Just make sure that all the plants you choose have the same sun and soil requirements and that your pots have drainage holes in the bottom.

6. Boxes

"Let's talk about wooden boxes," says Andre." They are very useful for creating a mini-garden. You can place several plants in a crate, or even stack some to create layers and add a vertical element to your garden display."

Starkey likes that crates are "made from renewable resources," but notes that they have a downside: "They can rot after a few years of being watered."

Fortunately, you can find free alternatives by asking around at local farms or produce stands.

7. Statues

Statues have long been used in gardens to create a certain atmosphere.

In a small container garden, look for an appropriately sized ornament that can nestle under a canopy of greenery. Or look for a piece that combines a statue and a container in one.