Plant DoctorCheck yellow leaves, leaf drop, root rot and pests

Likely cause: Persistently wet mix or restricted drainage may be one direction behind the yellowing.

When it fits: The mix is still wet and more than one older leaf is affected. This does not confirm root damage.

• Pause watering while the mix is still wet.
• Empty standing water and keep the plant in stable light with airflow.

Likely cause: Dry mix, light and environmental change all need checking; leaf colour alone is not a watering instruction.

When it fits: The mix is clearly dry and several leaves or new leaves are affected together.

• If the plant's appropriate dry point has been reached, water slowly until drainage runs through, then empty the saucer.
• Keep the position stable and do not water repeatedly straight away.

Likely cause: When only the lowest one or two older leaves are affected, normal ageing remains a reasonable possibility.

When it fits: The change is limited to older leaves and new growth is not declining at the same time.

• Keep the position stable and remove a leaf only when it is fully yellow or detached.
• Water from the mix condition, not from the number of yellow leaves.

Likely cause: Dry air or a cold AC draft may be contributing to tip damage.

When it fits: Crisp damage starts at the tips or edges and the plant sits in dry or cold airflow.

• Move the plant out of direct airflow while keeping light stable.
• If raising humidity, change the surrounding air and let foliage dry fully.

Likely cause: Strong light or heat may create a scorch-like appearance, but moisture and pests still need checking.

When it fits: Damage is concentrated on the light-facing side after a recent move into stronger light.

• Use suitable bright filtered light and acclimate gradually; keep undamaged leaves.

Likely cause: A local dry spot can relate to light, leaf damage or an environmental change.

When it fits: The spot is dry, stable and not spreading quickly.

• Keep light appropriate and remove only tissue that is fully dead and loose.

Likely cause: Soft or spreading spots call for less leaf wetness and a root/moisture check, not an instant disease label.

When it fits: Spots feel wet, expand or occur with persistently wet mix.

• Empty standing water and keep foliage dry with airflow.
• Record photos and separate visibly worsening foliage from other plants as a precaution.

Likely cause: Nutrient availability or media pH is one possible direction, but it is not a reason to fertilize blindly.

When it fits: Yellowing is mainly between the veins, especially on new leaves.

• Keep light stable and record new growth.
• Ask for species- and label-specific advice before adding nutrients.

Likely cause: Whole-leaf yellowing calls for a moisture, light, leaf-age and pest check.

When it fits: The colour change is across the leaf rather than a clear vein pattern.

• Decide about watering from the mix condition and keep the position stable.

Likely cause: Dry mix supports an underwatering direction, but recovery time cannot be promised.

When it fits: The mix is dry and the whole plant has lost turgor.

• Water thoroughly and slowly according to the plant type until drainage runs through.
• Empty the saucer and wait for the next appropriate dry point.

Likely cause: Drooping with wet mix is not a reason to add more water.

When it fits: The mix remains wet while the plant is limp.

• Pause watering, empty standing water and keep airflow and light stable.

Likely cause: Standing water with drooping calls for a drainage check, not more water.

When it fits: Water remains in the saucer or around the base.

• Empty standing water and place the pot where it can drain and receive airflow.
• Wait for the appropriate dry point before considering more water.

Likely cause: A wet root zone still may not be ready for water even when the saucer is empty.

When it fits: There is no visible saucer water, but the mix remains wet and the plant droops.

• Pause watering and keep the environment stable.

Likely cause: Environmental change may be a clue, but moisture and pests still need checking.

When it fits: Leaf drop follows a move, repot or direct cold airflow.

• Keep it in a suitable stable position away from direct drafts.
• Water from the mix condition and do not fertilize just because leaves drop.

Likely cause: Without a recent change, do not attribute all leaf drop to shock.

When it fits: Position, temperature and pot have been stable but leaves still drop.

• Keep conditions stable and pause unnecessary changes to water or fertilizer.

Likely cause: A sudden environmental change is one possible direction, but check roots, moisture and pests first.

When it fits: Green-leaf drop follows a move, AC or temperature change.

• Return to stable suitable light and avoid direct drafts.
• Water according to the mix rather than flooding after green-leaf drop.

Likely cause: Heavy green-leaf drop without a recent change needs a step-by-step moisture, drainage, pest and light check.

When it fits: The position is stable but leaf drop continues.

• Keep the position stable and hold extra water or fertilizer.

Likely cause: Insufficient light can stretch the internodes, but existing leggy growth will not shorten immediately.

When it fits: New growth stretches toward light and the position is dim.

• Improve light first and keep moisture appropriate for the plant.

Likely cause: If light is already adequate, check species, season, pruning and root conditions.

When it fits: The plant is bright enough but new stems remain thin and stretched.

• Keep light stable and hold strong fertilizer.

Likely cause: Low light or a cold draft may be limiting new-leaf development.

When it fits: New leaves are small, stems stretch and the position is dim or drafty.

• Improve light, avoid direct AC and hold fertilizer for now.

Likely cause: With adequate light, check moisture, drainage, root space and season before adding nutrients.

When it fits: Light is stable but new leaves remain small or pale.

• Keep light and position stable and water for the species.

Likely cause: Low light, cold or adjustment after a move can slow growth.

When it fits: Stalling coincides with dim light, cold/AC or a move.

• Keep moisture appropriate and do not force growth with fertilizer.

Likely cause: If conditions are stable, check moisture, root space, pests and season.

When it fits: Light is suitable but growth remains stalled.

• Keep the current care rhythm and avoid major changes for now.

Likely cause: Direct AC or a move can coincide with slower new growth; stabilize conditions first.

When it fits: The pause in new growth follows the environmental change.

• Move away from direct drafts while keeping suitable light, and stop repeated moves.
• Water from the mix condition rather than chasing growth with fertilizer.

Likely cause: If the timing does not fit, use the general stalled-growth checks for light, moisture, roots and pests.

When it fits: Stalling did not follow the change closely.

• Keep conditions stable without major water or fertilizer changes.

Likely cause: A persistently wet root zone needs attention; do not water by calendar.

When it fits: The deeper mix stays wet or the saucer repeatedly fills.

• Pause watering, empty standing water and improve airflow.
• Use photos for review rather than cutting roots yourself.

Likely cause: A dry surface does not prove a dry root zone; check deeper before watering.

When it fits: Only the surface feels dry and the root zone has not been checked.

• Hold water until deeper moisture is known.

Likely cause: Restricted drainage is an environmental issue that can be corrected first.

When it fits: There is no hole, a blockage or persistent saucer water.

• Empty the saucer and pause extra watering.
• If the pot must be changed, record the condition and ask for review if needed.

Likely cause: With visible drainage, check deeper moisture, light and roots rather than adding more water.

When it fits: Holes are clear and the saucer is empty, but the plant still has symptoms.

• Keep drainage clear and water according to plant type.

Likely cause: A soft or smelly base needs prompt human review, but it is not a confirmed diagnosis.

When it fits: The base is soft, dark or smells unusual, especially with persistently wet mix.

• Pause watering, separate from other plants as a precaution and improve airflow.
• Contact a human reviewer promptly rather than self-diagnosing from one sign.

Likely cause: Wet mix alone is not enough to conclude root damage.

When it fits: There is no soft base or unusual smell.

• Pause watering until the appropriate depth dries and empty standing water.

Likely cause: Old, compacted mix or crowded roots can affect watering; inspect before repotting.

When it fits: Water runs along the edges or roots visibly crowd the holes or surface.

• Water slowly and check whether the root ball is actually wetted; ask for review before repotting if needed.

Likely cause: With normal watering behaviour, return to moisture, light and leaf checks.

When it fits: There is no visible crowding or abnormal flow.

• Keep the current pot and water for the plant type.

Likely cause: Fixed white clusters can indicate a visible pest direction, but appearance alone cannot identify the pest.

When it fits: Clusters stay on undersides, nodes or petioles and may have sticky residue nearby.

• Separate it from other plants as a precaution and improve airflow.
• Use water or a damp cloth only on surfaces the plant tolerates.

Likely cause: Fine webbing with speckles can fit a mite direction, but the underside needs close inspection.

When it fits: Speckles appear in a dry setting with fine webbing underneath.

• Improve airflow and clean foliage only in a way the plant tolerates.
• Separate for observation and avoid extreme wetness or sun.

Likely cause: Without a clear dry-air clue, first rule out dust, scorch and other spots.

When it fits: Speckles or web-like appearance cannot be confirmed.

• Separate for observation and keep airflow.

Likely cause: Fixed shell-like bumps can fit a scale-insect direction, but photos and undersides are needed to triage.

When it fits: Bumps stay on stems, petioles or undersides with sticky residue.

• Keep airflow and record the area and count.
• Use water or a damp cloth only on surfaces the plant tolerates.

Likely cause: A powdery appearance can fit a fungal direction, but appearance alone is not a diagnosis.

When it fits: Leaves have an even powdery coating in a stuffy or leaf-wet setting.

• Reduce prolonged leaf wetness and separate the affected plant for observation.

Likely cause: Spreading brown spots need a check of direct sun, leaf wetness, airflow and pests.

When it fits: Brown spots enlarge, especially with high humidity or poor airflow.

• Keep foliage dry, improve airflow and separate cautiously if needed.
• Remove only leaves that are fully dead and loose.