How Many Creeping Thyme Seeds Do I Need Per Square Foot?

By Michael Chen · January 24, 2026

To determine how many creeping thyme seeds you need, plan for approximately 1 to 2 grams of seeds per square meter (about 0.035 to 0.07 ounces per 10.8 square feet) when sowing densely for ground cover. This estimate assumes standard germination rates and even distribution.

Understanding Creeping Thyme Seeding Requirements

Creeping thyme (Thymus serpyllum) is a low-growing, aromatic perennial often used as a drought-tolerant ground cover or between stepping stones. Knowing the correct seeding rate ensures full coverage without overcrowding or wasted seeds.

Factors That Influence Seed Quantity Needed

Planting area size: Larger areas require proportionally more seeds.
Desired density: For quicker coverage, use higher seeding rates.
Soil quality and preparation: Well-prepared soil improves germination, reducing the need for excess seeds.
Sowing method: Broadcast sowing may require slightly more seeds than precision planting.
Germination rate: Check seed packaging; older seeds may have lower viability.

Recommended Seeding Rates by Area

The following table provides precise creeping thyme seed quantities based on planting area and desired coverage level:

Area (sq ft)	Area (sq m)	Low Density (g)	Standard Density (g)	High Density (g)
10	0.93	0.1	0.15	0.2
50	4.65	0.5	0.75	1.0
100	9.3	1.0	1.5	2.0
500	46.5	5.0	7.5	10.0
1,000	93	10.0	15.0	20.0

Table data source:1, 2

Data shows that a standard rate of 1.5 g per 100 sq ft (1.6 g per sq m) balances cost and coverage speed. Higher densities accelerate establishment but increase material costs. Lower rates are economical but may require supplemental seeding in bare spots.

Best Practices for Sowing Creeping Thyme Seeds

Seedbed Preparation

Clear weeds and loosen the top 2–3 inches of soil. Mix in sand or compost if drainage is poor, as creeping thyme thrives in well-drained, slightly alkaline soils.

Sowing Technique

Mix seeds with fine sand (1:3 ratio) for even distribution.
Sow evenly by hand or using a small broadcast spreader.
Do not bury seeds deeply—press lightly into soil or cover with a thin layer (1/8 inch).
Water gently using a mist setting to avoid displacement.

Germination and Early Care

Seeds typically germinate in 14–28 days at temperatures above 65°F (18°C). Keep soil moist but not soggy during this period. Thin seedlings only if overcrowded.

Cost and Availability Considerations

A typical 1-gram packet of creeping thyme seeds costs $3–$5 and covers up to 100 sq ft at standard density. Buying in bulk (5g or more) reduces per-square-foot cost significantly. Reputable suppliers include Johnny's Selected Seeds, Eden Brothers, and Thompson & Morgan.

Frequently Asked Questions About Creeping Thyme Seeding

How much creeping thyme seed do I need per square foot?

You need about 0.015 grams of creeping thyme seed per square foot for standard coverage. This equates to roughly 1.5 grams per 100 square feet.

Can I overseed creeping thyme to fill gaps faster?

Yes, overseeding at a high-density rate (up to 2g per sq m) can help fill gaps quickly, especially in rocky or uneven terrain where germination may be spotty.