Best Plants to Cover Garden Soil Gaps

Garden soil gaps – those empty spaces between plants or in bare patches – can be a challenge for any gardener. Not only do these gaps look unfinished and untidy, but they can also lead to soil erosion, weed growth, and moisture loss. One of the best ways to address these issues is by planting ground covers and low-growing plants that spread quickly and fill the soil gaps effectively. These plants act as living mulch, helping to retain moisture, suppress weeds, and improve the overall health of your garden.

In this article, we will explore some of the best plants to cover garden soil gaps, focusing on options that are easy to grow, attractive, and suitable for a variety of climates and garden types.

Why Cover Soil Gaps?

Before diving into plant options, it’s important to understand why covering soil gaps is beneficial:

• Weed suppression: Bare soil is a perfect nursery for weeds. Covering gaps with plants reduces sunlight exposure to the ground, inhibiting weed seed germination.
• Moisture retention: Plants help shade the soil and reduce evaporation, keeping roots moist longer.
• Erosion control: Roots of ground cover plants hold the soil together, preventing washouts.
• Aesthetic appeal: A lush garden with no bare patches looks vibrant and well cared for.
• Soil health improvement: Many ground covers contribute organic matter when they shed leaves or die back.

Characteristics of Good Soil Gap Cover Plants

The ideal plants for covering garden soil gaps should have these features:

• Low-growing or creeping habit: To effectively cover ground without overshadowing taller plants.
• Rapid spreading ability: Through runners, rhizomes, or dense foliage.
• Hardiness: Ability to thrive in various conditions including sun/shade and different soil types.
• Low maintenance: Once established, minimal care requirements.
• Attractiveness: Flowers or foliage that add visual interest.

With this in mind, here are some top choices.

Best Plants to Cover Garden Soil Gaps

1. Creeping Thyme (Thymus serpyllum)

Creeping thyme is a fragrant, low-growing perennial herb that thrives in sunny locations. It spreads quickly via runners to form a dense mat of evergreen foliage which produces tiny purple-pink flowers in summer.

• Height: 2–3 inches
• Sun exposure: Full sun
• Soil: Well-drained
• Benefits:
• Attracts pollinators like bees.
• Drought-tolerant once established.
• Edible leaves can be used for cooking or tea.

Ideal for filling gaps between stepping stones or along pathways.

2. Creeping Jenny (Lysimachia nummularia)

Creeping Jenny is a fast-spreading ground cover with small round leaves that create a lush carpet. It is especially good in moist areas and tolerates partial shade.

• Height: 4–6 inches
• Sun exposure: Partial shade to full sun
• Soil: Moist, well-drained
• Benefits:
• Bright chartreuse foliage adds color contrast.
• Can be grown near water features or ponds.
• Good erosion control on slopes.

Beware it can be aggressive in some regions; control spread accordingly.

3. Ajuga (Bugleweed)

Ajuga is a versatile perennial known for its glossy dark green or purple leaves and spikes of blue flowers. It forms thick mats quickly.

• Height: 3–6 inches
• Sun exposure: Sun to partial shade
• Soil: Moist, well-drained
• Benefits:
• Deer-resistant.
• Attracts pollinators such as bees and butterflies.
• Performs well in shady gardens where grass struggles.

Great for filling shady spots under trees or along borders.

4. Sedum (Stonecrop)

Sedums are succulent perennials with fleshy leaves that come in many colors and forms. They thrive in poor soils and dry conditions.

• Height: Varies by species; typically 2–6 inches for ground covers
• Sun exposure: Full sun
• Soil: Well-drained, sandy or rocky soil
• Benefits:
• Low water needs; drought tolerant.
• Adds an interesting texture to gardens.
• Flowers attract butterflies.

Perfect choice for rock gardens or sunny dry areas with challenging soils.

5. Sweet Woodruff (Galium odoratum)

Sweet woodruff is a shade-loving perennial with whorls of delicate leaves and small white star-shaped flowers in spring.

• Height: 6–12 inches
• Sun exposure: Partial shade to full shade
• Soil: Moist but well-drained
• Benefits:
• Fragrant when crushed; often used in potpourri.
• Excellent under trees or shrubs where grass won’t grow.
• Spreads slowly but steadily by rhizomes.

Ideal for shady woodland style gardens.

6. Irish Moss (Sagina subulata)

Irish moss forms a vivid green cushion-like mat that works well between stepping stones or as edging.

• Height: Around 2 inches
• Sun exposure: Full sun to partial shade
• Soil: Moist but well-drained
• Benefits:
• Soft texture; looks like moss but is a flowering plant.
• Produces tiny white flowers in early summer.

Great alternative lawn substitute for small areas or paths where minimal foot traffic occurs.

7. Vinca Minor (Periwinkle)

This evergreen ground cover has shiny oval leaves and periwinkle-blue flowers appearing from spring through summer.

• Height: About 4–6 inches
• Sun exposure: Partial shade (tolerates full sun)
• Soil: Adaptable but prefers well-drained
• Benefits:
• Very hardy; tolerates drought once established.
• Good erosion control on slopes.

Widely used in woodland gardens and large open spaces needing quick cover.

8. Lamium (Dead Nettle)

Lamium has attractive variegated foliage often edged with silver markings and produces small pink, white, or purple flowers during spring and summer.

• Height: Around 6–12 inches
• Sun exposure: Partial shade to full shade
• Soil: Moist but well-drained
• Benefits:
• Deer resistant.
• Low maintenance; spreads moderately fast.

Excellent choice to brighten shady areas under trees or along fences.

9. Dichondra Repens

Also known as kidney weed or lawn leaf creeper, dichondra has small rounded leaves forming dense mats resembling moss.

• Height: About 1 inch tall
• Sun exposure: Full sun to partial shade
• Soil: Well-drained
• Benefits:
• Tolerant of light foot traffic.
• Provides soft green carpet effect similar to lawn grass without mowing needs.

Works well between stepping stones or in narrow spaces requiring coverage.

10. Corsican Mint (Mentha requienii)

Corsican mint is an aromatic ground cover with tiny round leaves releasing mint fragrance when walked on or brushed against.

• Height: Around 1–2 inches
• Sun exposure: Partial shade to full sun (prefers some shade)
• Soil: Moist but well-drained
• Benefits:
• Adds fragrance dimension to your garden paths.
• Spreads quickly but manageable with trimming.

Perfect for planting between pavers where you want scent and greenery combined.

How to Establish Ground Covers Successfully

To get the best results from these plants covering your garden’s soil gaps:

1. Prepare soil properly – Remove weeds, loosen compacted soil, amend if needed with organic matter for better drainage and nutrients.

2. Select appropriate plants based on sunlight, moisture levels, and climate zone specific to your garden location.

3. Plant densely – Most ground covers spread through runners; planting them close speeds up coverage and outcompetes weeds faster.

4. Water regularly during establishment phase – For the first few weeks until roots develop deeply, consistent moisture helps prevent stress.

5. Mulch sparingly around new plants only if needed; too much mulch may hinder runners from touching the soil directly.

6. Monitor growth yearly and prune back invasive species as necessary to keep balance within your garden design.

Conclusion

Covering garden soil gaps with the right plants enhances both function and beauty in your outdoor space. Whether you need sun-loving succulents like sedum for rock gardens or shade-tolerant options like sweet woodruff under tree canopies, there are many excellent choices available that thrive with minimal care while suppressing weeds and conserving moisture.

Incorporating these ground covers not only fills those awkward empty patches but also creates a cohesive look throughout your garden that will flourish season after season. With thoughtful placement and proper care, you can transform bare soil into lush carpets of green that support the health of your entire landscape ecosystem.