Should I cut off the brown tips?

You can trim the brown parts off with clean scissors for aesthetic reasons. Avoid cutting into the healthy green tissue to prevent further stress.

Does low humidity cause brown tips?

While this plant prefers moderate humidity, it is usually quite hardy. Focus on soil moisture first as that is the primary cause for this species.

spiny sowthistle: brown tips, causes and fixes

Check these first

Feel the soil moisture two inches below the surface.
Inspect the soil surface for white mineral deposits.
Check the drainage holes to ensure they are not blocked.

Likely causes

Inconsistent Watering
Most likely
How to tell: The leaf tips turn crispy and brown while the rest of the leaf remains green. The soil feels dry and pulls away from the edges of the pot.
What to do: Water the plant every 3 to 7 days to keep the soil consistently moist. Ensure the water drains completely through the bottom holes so the roots do not sit in a puddle.
Mineral Buildup
Possible
How to tell: You see a white, crusty layer on the surface of the soil or the rim of the pot. The leaf tips brown even though the soil feels moist.
What to do: Flush the soil by running clean, room temperature water through the pot for several minutes. Use filtered or distilled water if your tap water is very hard.

Find out what's wrong with your spiny sowthistle

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

Worry if the browning spreads rapidly toward the center of the leaves. A single brown tip on an older leaf is just part of the natural aging process.

Stopping it coming back

Maintain a steady watering schedule and flush the soil occasionally to prevent salt accumulation.

Keep your spiny sowthistle healthy from here

Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.

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Questions people ask

Should I cut off the brown tips?: You can trim the brown parts off with clean scissors for aesthetic reasons. Avoid cutting into the healthy green tissue to prevent further stress.
Does low humidity cause brown tips?: While this plant prefers moderate humidity, it is usually quite hardy. Focus on soil moisture first as that is the primary cause for this species.

Why are my spiny sowthistle leaf tips turning brown?