Spring Lawn Seeding vs. Crabgrass Prevention: Using Tupersan (Siduron)

Situation

Northeast homeowner, rocky soil, hired ScottsLawn. They want crabgrass preventer now, seed in fall. Homeowner wants to rake, topsoil, seed now before heat. Lawn looks dead—loose dirt, dead crabgrass in sun.

Expert Solution

Seed now with Tupersan-based product.

• Normal crabgrass preventers kill grass seed.
• Tupersan (siduron) prevents crabgrass but allows turfgrass germination.
• Scotts sells "Turf Builder Starter Fertilizer + Halts" with Tupersan.
• Pro companies can apply liquid Tupersan directly.

Action Plan

1. Rake dead grass now.
2. Apply Tupersan-based starter fertilizer + crabgrass preventer.
3. Wait 30–45 days, then seed.
4. Water daily 10–15 min (keep moist) until grass 2–3".
5. Then transition to deep, infrequent watering.
6. Overseed again in September (best time).
7. Fertilize late spring, early fall, late fall. No summer fertilizer.
8. Crabgrass preventer early spring (March/April) if using Tupersan.

Why Seed Now

Bare soil erodes and compacts in summer. Spring seeding establishes cover.