Fruitless Mulberry in a School Parkway: Roots and Silkworms

Fruitless mulberry (Morus alba) roots spread 1.5× canopy width but grow under pavement without lifting it—safe near walkways. Silkworms aren't a natural concern in California; they'd need to be introduced intentionally. If they appear, it's an educational opportunity.

These trees are well-suited for parkways: fast-growing, drought-tolerant once established, and fruitless. Provide adequate water during establishment.