The fastest spreading ground cover depends on what matters more to you: raw speed or long-term results. Clover and creeping thyme fill bare areas in one season. But they die in winter and need replanting. Creeping juniper takes longer to fill in. The trade-off is permanent green coverage that lasts decades with no replanting needed.
I've tested both approaches on my own property. A patch of white clover covered a bare area in about 8 weeks during summer. It looked great until November when it turned brown and left bare soil through winter. My creeping juniper planting next to it looked sparse for the first two years. But by year four, the juniper formed a dense mat that stayed green through every season. Five years later, the clover patch has been replanted three times while the juniper just keeps spreading on its own.
When comparing fast growing ground cover plants, you hit a critical trade-off between speed and control. English ivy and vinca spread fast and stay green year-round, but both are classified as invasive in many states. They escape gardens and choke out native plants in nearby forests. Creeping juniper grows at a moderate pace of about 1.4 inches of terminal growth per season and stays where you plant it. It won't climb walls, strangle trees, or take over your neighbor's yard.
Among creeping junipers, Blue Rug and Icee Blue are the fastest spreaders you can buy. Both reach a mature spread of 6 to 8 feet across and hug the ground at just 4 to 6 inches tall. These two cultivars push out lateral branches more aggressively than compact types like Blue Chip or Blue Star. If speed matters to you, Blue Rug is the variety to grab at the nursery.
If you want a quick spreading evergreen ground cover that won't cause problems, creeping juniper checks every box. It stays green through winter and handles drought, road salt, and deer. It never becomes invasive in your yard or your neighbor's. No other evergreen ground cover gives you that mix of toughness and good behavior across USDA zones 3 through 9. You get year-round color without the risk of losing control over the planting.
To get the fastest possible juniper coverage, plant Blue Rug cultivars 4 to 6 feet apart in full sun with soil that drains well. Skip the shade and avoid heavy clay. Water through the first summer, then let the plants fend for themselves. With tight spacing and good conditions, you can expect a solid carpet within 3 to 5 years that needs almost no maintenance for the rest of your life.
Read the full article: Creeping Juniper: Complete Growing Guide
