17 Budget-Friendly Plants That Fill Empty Garden Spaces Fast Before Summer’s Gone
Empty patches in your garden can feel like a missed chance, especially when summer is racing by. The good news is that plenty of fast-growing plants cost little and fill those bare spots in just a few weeks. Whether you want color, greenery, or a burst of blooms, these budget picks work hard without draining your wallet. Here are 17 plants that spread, sprawl, and shine quickly so your yard looks full before the season fades.
1. Zinnias
Toss a handful of zinnia seeds into a sunny gap and you will have a carnival of color faster than most plants even sprout. Reaching bloom in as little as six weeks, they are the sprinter of the summer flower world.
A single seed packet costs about the price of a coffee, yet it can fill a whole stretch of empty bed. The more you snip for bouquets, the more they push out fresh buds, so cutting them actually keeps the show going.
Butterflies and bees treat a zinnia patch like a diner, which adds movement and life to your yard. They shrug off heat and dry spells once rooted, making them forgiving for beginners. Fun fun fact: their name honors Johann Gottfried Zinn, an 18th-century botanist who studied them long before they became a backyard staple.
2. Sunflowers
Nothing fills a blank corner with drama quite like a row of sunflowers stretching toward the sky. Some varieties shoot up several feet in a matter of weeks, turning a bare fence line into a golden wall.
Seeds are cheap and can go straight into the ground, no fancy setup required. Dwarf types stay knee-high for containers, while giants tower overhead for instant screening.
Beyond the good looks, the seed heads feed finches and other birds well into fall, giving you a second act after the petals drop. They love full sun and drink up heat that would sulk other plants. Plant a few in staggered weeks and you can keep fresh blooms opening long after the first round finishes.
3. Marigolds
Cheerful and tough as nails, marigolds pack a lot of punch for pocket change. Their orange and yellow pom-poms open quickly from seed and keep blooming until frost knocks them back.
Gardeners love tucking them between vegetables because their strong scent may help deter certain pests from tender crops. A single flat from the garden center is inexpensive and fills a border in an afternoon.
They handle poor soil and blazing afternoons without complaint, so those forgotten spots near the driveway suddenly look intentional. Deadhead the spent blooms and they reward you with even more. French marigolds stay compact for edging, while African types grow taller for bolder mass color.
4. Cosmos
Feathery leaves and airy pink, white, and magenta blooms give cosmos a wildflower charm that fills space with a soft, dreamy texture. Sow the seeds directly and they bolt into bloom within a couple of months.
Poor soil is actually their friend, since rich ground makes them grow leggy with fewer flowers. That means you can scatter them in that neglected strip you never bothered to amend.
They sway in the slightest breeze, adding gentle motion that makes a garden feel alive. Pollinators adore them, and the plants often reseed themselves for a free encore next year. For the cost of one packet, you can turn a dull gap into a cottage-style cloud of color.
5. Sweet Alyssum
Low and lacy, sweet alyssum spreads into a fragrant carpet that smells faintly of honey on warm days. It fills the ground-level gaps that taller plants leave bare, softening the edges of beds and pathways.
A tiny transplant costs next to nothing and quickly sprawls to cover a foot or more. The cloud of tiny white or purple flowers keeps coming through the heat of summer.
Beneficial insects like hoverflies flock to it, and those helpers happen to snack on aphids that trouble nearby plants. Tuck it along a walkway or spill it over a container edge for an easy, breezy look. When the weather sizzles, a light trim brings a fresh flush of bloom.
6. Nasturtiums
Both pretty and useful, nasturtiums trail across bare ground with round leaves and jewel-toned blooms in red, orange, and yellow. The seeds are big enough to handle easily and sprout fast, making them a favorite for impatient gardeners.
Every part above the soil is edible, adding a peppery kick to salads that surprises dinner guests. They thrive on neglect, actually blooming best in lean soil with little fuss.
Let them ramble as a ground cover or train them up a small trellis for vertical interest. They can also lure aphids away from your veggies, acting as a sacrificial decoy. For a couple of dollars a packet, you get color, food, and a bit of pest strategy all at once.
7. Petunias
Few plants earn their price faster than petunias, which pour out trumpet-shaped blooms nonstop from a single small pot. A modest six-pack from the nursery fills a hanging basket or a bare border in short order.
They come in nearly every color you can imagine, so matching your porch or fence is easy. Spreading types like the wave varieties gallop across the ground, covering wide gaps with a river of flowers.
Give them sun and a regular drink and they keep the color coming for months. Pinch back the leggy stems now and then to keep the plant bushy and loaded with buds. For fast, dependable coverage on a budget, they are hard to beat.
8. Coleus
Who needs flowers when the leaves do all the talking? Coleus fills shady, awkward spots with foliage in electric lime, deep burgundy, and splashy pink patterns that outshine many blooms.
Starter plants are inexpensive, and here is the money-saving trick: snip a stem, stick it in water, and it roots in about a week to make free new plants. That means one purchase can multiply across your whole bed.
It shrugs off the shade where sun-lovers refuse to grow, brightening those gloomy corners under trees. Pinch the tops to keep it full and bushy instead of tall and floppy. A single afternoon of cuttings can turn one plant into a dozen colorful fillers.
9. Impatiens
Struggling with a shady patch where nothing seems to bloom? Impatiens step in with mounds of cheerful color exactly where most flowers give up. They fill dim corners under trees and along the north side of the house with ease.
A budget six-pack quickly bushes out into a solid blanket of red, pink, white, or coral. They bloom steadily all summer without much begging, just steady moisture.
The plants keep a tidy, rounded shape, so they look neat without constant trimming. Space a few apart and watch them close the gaps between as they grow. For reliable shade color that does not break the bank, they earn their spot every year.
10. Morning Glory
Give morning glory a fence, a trellis, or an old mailbox post and it will race upward, covering ugly spots with heart-shaped leaves and trumpet blooms. The vines can climb several feet in a season, making them a fast fix for vertical gaps.
Seeds are cheap, and a light soak overnight helps them sprout even quicker. Each morning brings a fresh set of blue, purple, or pink flowers that open with the sun.
They ask for little beyond something to climb and a sunny spot. Because they can reseed readily, plant them where you truly want a permanent show. For hiding a chain-link fence or a bare wall fast, few climbers do the job so cheaply.
11. Portulaca
For that scorching strip along the sidewalk where the soil feels like dust, portulaca thrives when everything else fries. Also called moss rose, its succulent leaves store water so it barely notices a dry spell.
The bright, papery blooms in neon pink, orange, and yellow open under full sun and sprawl into a low mat. A single flat costs little and quickly covers hot, sandy ground.
It practically demands the worst conditions, blooming happily where you least expect. Skip the fuss of frequent watering and let the sun do the work. If you have a punishing spot that always looks bare, this tough little charmer fills it in with ease.
12. Creeping Jenny
Trailing and golden, creeping jenny pours across bare ground and over container edges like a spill of coins. Its rounded chartreuse leaves brighten shady gaps and knit together into a dense mat fast.
One small pot spreads far, so you get a lot of coverage without buying many. It roots as it travels, which means it fills space and stays put on slopes.
The glowing color pairs beautifully with dark mulch or deep-leaved neighbors, making everything around it look richer. Keep it where you want it, since its eager spread can wander. As a living carpet for tricky corners, it is one of the thriftiest ground covers you can plant.
13. Salvia
Spiky and upright, salvia sends up flower stalks that add height and structure to a flat, empty bed. The purple, red, and blue spires draw hummingbirds and bees like a magnet all summer long.
Annual types grow fast from inexpensive nursery starts, filling in within weeks. Many varieties are drought-tolerant once settled, so they hold up when the watering can runs dry.
Their strong-scented foliage tends to be left alone by deer and rabbits, a quiet bonus in browsed yards. Cut back the faded spikes and fresh ones follow. When you need vertical punch and pollinator traffic without a big budget, salvia delivers both.
14. Sweet Potato Vine
Grown for its bold leaves rather than blooms, ornamental sweet potato vine gallops across the ground and cascades from pots with lime-green or deep-purple foliage. It fills wide spaces faster than almost any other trailer.
A single starter plant sends out long, leafy runners that cover several feet by mid-season. The dramatic color contrast makes it a designer look for a bargain price.
It laughs at heat and keeps growing when other plants slow down in the dog days. Trim the runners to shape it, and you can even root the cuttings for more. For sweeping, low-cost coverage with big visual impact, this vine is a workhorse.
15. Celosia
Flame-shaped and fuzzy, celosia looks like it caught fire in the best possible way. The plumes of red, orange, and gold add unusual texture that instantly fills a plain bed with drama.
Inexpensive from seed or small transplant, it settles in quickly and blooms right through the heat. The odd, brain-like cockscomb types make a real conversation starter.
Heat and humidity barely faze it, so it keeps its color when summer turns brutal. The blooms also dry beautifully, letting you bring the garden indoors for winter bouquets. For a bold, offbeat filler that stands out from the usual flowers, celosia earns its place.
16. Verbena
Spreading wide and blooming long, verbena forms flat clusters of tiny flowers that stitch together into a colorful mat. It fills the middle ground between tall plants and creeping ground covers with clouds of purple, pink, and red.
A single trailing plant covers a surprising amount of space, so a small purchase goes far. Butterflies find the flat flower heads perfect landing pads, adding fluttering life to the scene.
It handles heat and drought once established, holding color when the calendar hits its hottest stretch. A light shearing mid-summer keeps it blooming strong instead of fading. For sprawling color that pulls double duty as a pollinator stop, verbena is a smart, thrifty pick.
17. Nicotiana
As the sun sets, nicotiana comes alive with a sweet perfume that drifts across the yard on warm evenings. The star-shaped flowering tobacco blooms fill gaps with soft color and a fragrance that other fillers simply cannot match.
Grown easily from cheap seed or small starts, it reaches blooming size quickly and keeps going for weeks. Tall varieties add height at the back of a bed, while shorter ones tuck into the front.
Moths and hummingbirds visit the tubular blooms, especially near dusk, giving you a garden that entertains after dinner. It tolerates part shade, so it brightens spots where sun-lovers falter. For an evening-scented surprise that costs very little, nicotiana is a memorable choice to close out the list.