Why German roach jobs aren't one-and-done
German cockroaches reproduce on a 28-day cycle. Eggs hatch about 2 weeks after being laid, and nymphs reach breeding age in another 30–60 days. If you only treat once, the egg cases that didn't have contact with the bait will hatch — and you're back to square one.
A real protocol:
- Visit 1 (week 0): Treat hot zones with non-repellent gel baits (Advion, Maxforce Quantum, Vendetta Plus). Apply IGRs (insect growth regulators) to break reproduction. Identify harborage areas.
- Visit 2 (week 2): Re-bait active zones. Treat any new harborages identified. Adjust strategy based on what's working.
- Visit 3 (week 4–6): Confirm elimination. Final preventative bait placement in vulnerable areas (under fridge, behind dishwasher, around plumbing).
Cost includes all 3 visits.
What you should NEVER do (and why pros don't)
- Foggers / bombs scatter roaches deeper into walls. After the gas dissipates, the population is wider-spread.
- Sprays around bait are repellent — they push workers away from the bait that would actually kill the colony.
- Boric acid powder can work over 4–6 weeks if applied perfectly, but DIY application usually means dust where pets/kids walk.
Apartment buildings / row homes
If you're in an attached unit, the roaches almost certainly came from a neighbor's unit through shared walls and plumbing. Our recommendation:
- Treat your unit first (don't wait)
- Politely alert immediate neighbors and offer them an inspection
- Coordinate with the building manager if multiple units are affected
Treating one unit while a neighbor unit is untreated = roaches just come back from next door in 4–6 months.