Day 21: The canopy keeps rebuilding · Autoflower Cannabis in a LetPot: Air Gap and Droop Recovery

Visual evidence

What Dud2Bud observed

The plant is larger and more upright, and its active growth remains viable. Older leaves continue to fail, but the current image does not clearly show new widespread damage. Because a half-strength top-up was recently made, holding steady is safer than changing the reservoir again.

The canopy has expanded substantially since the previous photo.

The plant is standing more upright and has multiple active growth tips.

The upper leaves are mostly green and structurally intact.

The plant has continued vegetative development over 120 hours.

Several older lower leaves are yellow, brown, and necrotic.

Some upper and middle leaves still droop or show curled edges.

Some leaf tips and margins appear pale or browned.

The reservoir was topped up with half-strength solution, so the current nutrient and water level changed.

Old damage

Severe brown lower leaves that were already damaged during the earlier stress episode.

Old damage

Existing necrotic patches that are not visibly spreading into the newest central growth.

Still uncertain

The current lighting and flash make leaf color and tip damage difficult to compare precisely.

Still uncertain

The waterline, air gap, EC, pH, and roots are not visible.

Still uncertain

The effect of the half-strength top-up cannot be separated from ongoing recovery.

Still uncertain

The newest top growth is partly obscured by overlapping leaves.

Dud2Bud decision

Keep the new reservoir condition steady

The plant is growing and standing better, while another immediate correction could create the same oscillation that complicated the earlier recovery.

What to do

Hold the half-strength solution steady

Do not add more A/B, dilute again, or change the waterline today. The plant is growing better overall, and the recent top-up needs a clean observation window.

1 Leave the reservoir at its current half-strength condition.
2 Do not add more nutrients or supplements.
3 Do not remove multiple damaged leaves while the plant is still rebuilding; judge the next photo by new growth.

Exact change

none

Keep steady

Keep the current half-strength solution, waterline, air gap, light schedule, and airflow unchanged.

What happened before the next photo

Learned about air gap and lowered the waterline.

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Full assessment

How this photo was assessed

The report separates visible facts, possible explanations and the final care decision so uncertainty remains visible.

Visible evidence What was visible in the photo

Vigor

Improving

Current vigor is improving in the newer growth, although the plant is still carrying substantial residual damage.

Confidence: 76%

Color Analysis

Watch

Color is improving in some growth but not uniform. The recent half-strength top-up makes it too early to infer a deficiency or excess from color alone.

Confidence: 67%

Growth Development

Improving

Vegetative growth is continuing and the plant is rebuilding its canopy.

Confidence: 86%

Progress Comparison

Improving

The trajectory is positive overall, but the recent reservoir top-up creates a new observation window before further conclusions.

Confidence: 84%

Damage Classification

Watch

The main pattern still looks like recovery from prior stress, with possible mild ongoing nutrient or root-zone imbalance to watch.

Confidence: 75%

Distribution Analysis

Improving

The plant is recovering from the top down rather than showing a new uniform canopy problem.

Confidence: 80%

Possible mechanisms What could explain it

Disease

Watch

Root disease cannot be excluded, but continued upper-canopy growth makes immediate disease treatment unsupported.

Confidence: 47%

Nutrition

Watch

Nutrient strength may now be closer to usable than before, but the current photo cannot distinguish mild deficiency, residual damage, or photo-related color shift.

Confidence: 56%

Environment

Watch

Environment may influence leaf posture and color, but changing it now would add another confounding variable.

Confidence: 54%

Biotic Damage

Clear

Pests are not the leading explanation.

Confidence: 77%

Water Relations

Watch

Water access and oxygen space remain important in this setup, but the plant's improved posture does not justify another level change today.

Confidence: 54%

Structural Analysis

Improving

Structural function is improving and no support intervention is currently needed.

Confidence: 74%

Decision checks Why this action was chosen

Recovery

Improving

Recovery is continuing in the active growth, although older leaves may keep declining.

Confidence: 85%

Information Gap

Watch

More evidence could change the next action if new growth worsens, but it does not require a new measurement or treatment today.

Confidence: 70%

Limiting Factor

Watch

The best current strategy is to avoid further oscillation and let the new solution condition settle.

Confidence: 57%

Confidence Audit

Watch

Confidence is high for continued recovery and low-change care, but moderate for nutrient interpretation.

Confidence: 80%

Intervention Evaluation

Unknown

The plant is improving overall, but the recent top-up is a confounder. Do not credit or blame it yet.

Confidence: 55%

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This supporting report documents the visual evidence and care decision from one point in a longer plant journey. It is not indexed separately from the main plant story.