White crust on coco/clay diagnosis and rinse protocol—beyond nutrient burn leaf tips.
Marjoram vs oregano distinction in hydro—extends oregano guide without cloning it.
Tart perennial/leaf herb gap with acidity/harvest notes—not generic herb list.
Long-leaf cilantro cousin with bolt/shade quirks—not cilantro rewrite.
Callaloo/amaranth leafy lane—distinct from mustard/swiss chard guides.
Heat-loving vine green gap—not spinach/lettuce clones; trellis + warm-res focus.
First-use rinse/buffer workflow across coco/rockwool/clay—ops layer on media primers.
Roof runoff risks, testing, and blending—distinct from municipal chlorine/hard-water guides.
Probe longevity SOP (storage solutions, KCl, dry-out)—extends meters guide without rewrite.
Chelate forms and pH windows for Fe/Mn/Zn—beyond iron-deficiency symptom guide.