Hard Brown Scale on Large Jade Plant: Indoor-Safe Systemic Spikes or Horticultural Oil

Options for Indoor Use

1. Bayer Insect Control Fertilizer Spikes (systemic): effective on soft scale; uncertain on hard scale. Check label.
2. Horticultural oil (e.g., Bonide All Seasons): smothers hard & soft scale. Non-toxic, safe for pets if dry. Repeat weekly until bumps slough off.
3. Manual scraping: gentle, if infestation light.

Monitoring

Check for reinfestation. Systemic lasts months; oil needs reapplication.