Dogwoods do seem like a safer bet overall. Had a similar issue with a crabapple myself—roots got into the lines and it was a costly mess. But I've seen dogwoods near septic systems hold up pretty well over the years, too. From what I've read, their root systems tend to be shallower and less invasive compared to other small trees. Still, it's always good practice to keep an eye on any tree planted near septic areas—regular inspections every couple of years can save you a lot of headaches down the road. Sounds like your neighbor's experience is promising though, so fingers crossed yours stays trouble-free as well...
Had a similar issue a few years back, but with a willow tree—talk about invasive roots. Ended up replacing a whole section of pipe, not fun. Dogwoods are definitely safer, but I'd still recommend planting them at least 15-20 feet away from any septic lines if you can. Even shallow roots can surprise you sometimes, especially if the soil conditions encourage them to spread out more horizontally. Better safe than sorry...
Yeah, willow roots are brutal—seen them bust through pipes like they're nothing. Dogwoods are definitely safer, but honestly, even smaller shrubs can cause headaches if they're thirsty enough. Had a customer once whose azaleas managed to clog up the drainfield lines. Soil type matters too; sandy soils tend to encourage roots to spread wider looking for moisture. I'd say 20 feet minimum is a good rule of thumb, just to be safe.
Good points overall, but I'm not sure 20 feet is always enough. I've seen roots from smaller shrubs like boxwoods and hollies creep further out, especially in drought situations or compacted soils. I'd personally err on the side of caution—maybe push that buffer to 25 or even 30 feet if possible. Better safe than sorry...trust me, emergency septic repairs aren't fun late-night calls.
"Better safe than sorry...trust me, emergency septic repairs aren't fun late-night calls."
Haha, been there, done that—definitely not a call you wanna make at midnight. I get your point about roots traveling further than expected, especially with drought conditions. But honestly, pushing out to 30 feet feels a bit excessive for smaller shrubs like boxwoods. Maybe 25 feet is a good compromise? Balances caution with practicality, especially if you're tight on yard space or budget (like me). Just my two cents...