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Drooping crown of thorns: causes and fixes

Euphorbia milii

Quick answer

Your crown of thorns can droop when the soil is too dry or too wet, and the leaves can look the same in both cases. Check the soil first.

Crown of thorns (Euphorbia milii)
Crown of thorns · Euphorbia milii
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Toxic to pets

Most likely cause

Rot at the base

Pixel illustration of water being poured out of a saucer into a bowl

How to tell

  • Soggy roots at the base can also cause drooping because damaged roots cannot take up water.
  • The soil is wet, the base feels soft, and adding more water makes the damage worse.
  • Small dark flies around moist potting medium may be fungus gnats.

The fix

  1. 1
    Stop watering and let the soil dry out fully.
  2. 2
    Check that the pot drains.
  3. 3
    If only some roots are soft or brown, trim them and repot in fresh, dry, fast-draining mix.
More about this

They suggest conditions suitable for breeding, without proving that the surface never dries.

If the base itself is soft, the damage is more serious and recovery is uncertain. Only propagate using a method suited to this plant, not arbitrary pieces above the rot. Wear gloves and eye protection before cutting or dividing. The milky latex can irritate skin and seriously harm eyes, and the stems have sharp spines. Avoid contact with the sap and wash your hands after handling. Keep cut pieces away from children and pets.

Other possible causes

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Thirst (dry potting mix)

The soil is bone dry and the whole plant has gone limp, often with wrinkled stems beforehand.

The fix

  1. 1
    If the soil is dry, water thoroughly (for a crown of thorns that’s usually every 8 to 12 days in summer).
More about this

It takes a few days to firm up again.

Cold, wet roots

Cold exposure can damage the plant even with dry roots.

How to tell

  • Wet mix in a cold spot also increases the risk of rot.

The fix

  1. 1
    Move it away from cold glass and drafts to a spot with suitable, steady temperatures.
  2. 2
    Water according to moisture, only when the top 5 cm (2 in) of soil feel dry.
  3. 3
    Check drainage and do not water just because a calendar says it is time.

Recently moved or repotted

Drooping began after a purchase, move or repot.

How to tell

  • A move can change light and temperature without disturbing the roots.

The fix

  1. 1
    Check moisture and roots before changing anything.
  2. 2
    Keep its spot and care steady and don’t fertilize while it settles.
  3. 3
    If roots were damaged, follow this plant’s repotting guidance.
More about this

Water according to moisture, only when the top 5 cm (2 in) of soil feel dry. Check drainage and do not water just because a calendar says it is time.

All crown of thorns guides

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