What are the tiny red-brown specks on my new plant leaves?

What's likely going on

From the photo, the leaf has lots of tiny red‑brown dots and a dusty, slightly faded look. That pattern strongly suggests spider mites:

• They are teeny (pin‑sized) red, brown, or yellowish specks that move slowly.
• They cause a fine, speckled or sand‑dusted appearance on the leaf.
• With a magnifying glass you’ll usually see more mites and sometimes very fine webbing, especially on the underside and where the leaf meets the stem.

Less likely possibilities are dried mineral spots or soil splash, but those usually don’t give the overall faded, stippled look.

Because several plants from the same grower have the same issue, assume it’s a shared pest and keep them isolated from the rest of the collection.

What to do

1. Confirm they’re alive.

   • Look closely at the undersides of leaves with a magnifying glass or phone zoom. Tap a leaf over white paper – if the specks fall and start to crawl, they’re mites.

2. Give the plant a thorough rinse.

   • Take it to a sink or shower and gently wash both sides of every leaf with lukewarm water, wiping with your fingers or a soft cloth to physically remove mites.

3. Treat with insecticidal soap or neem.

   • Spray tops and undersides of leaves and stems until they’re well covered but not dripping. Repeat every 4–7 days for at least 3–4 rounds to catch new hatchlings.
   • Keep pets and kids away until the product is dry; follow the label carefully.

4. Clean the grow box.

   • Wipe down shelves, walls, and any tools with soapy water or a mild disinfectant so stray mites don’t re‑infest.

5. Check any other plants from the same source.

   • Treat them preventively if you see even a few similar specks.

How to prevent it

• Quarantine all new plants for at least 2 weeks before putting them with the rest.
• Shower or wipe new arrivals to remove hitchhikers.
• Keep plants well‑watered but not stressed; dry, dusty air encourages spider mites, so a bit more humidity and occasional leaf wiping helps.

When to worry

• If webbing becomes obvious, leaves turn grayish or bronzed, or new growth is deformed, the infestation is heavy – continue treatments and consider a stronger miticide.
• If, after 3–4 treatment cycles, you still see lots of moving mites, consult a local nursery or extension service for a targeted miticide plan.