Soil pH and Fertilizer Guide for Cactus, Succulents, Croton, Dieffenbachia

pH Preferences

Most houseplants (including listed) prefer neutral pH ~7. Acid-loving (pH 5-6): Azalea, Norfolk Pine, Gardenia, Anthurium, Boston Fern, African Violet.

Fertilizer

20-20-20 diluted per label (or more) is fine. Over-fertilizing causes yellowing.

Critical Cultural Tip

All listed plants hate overwatering. Use moisture meter ($10-15) to ensure root zone dry before watering.

Resource

Excellent Houseplant Care Article