Plant Mood — Blog https://www.plantmood.farm/blog Guides, experiments, and insights on hydroponics, microgreens, DIY grow systems, sensor stacks, and small-farm unit economics. en Mon, 27 Apr 2026 13:05:28 GMT Plant Mood build (Vite + Supabase) How to grow sunflower microgreens in Bangkok: seed to harvest guide https://www.plantmood.farm/blog/how-to-grow-sunflower-microgreens-bangkok https://www.plantmood.farm/blog/how-to-grow-sunflower-microgreens-bangkok Mon, 27 Apr 2026 08:27:07 GMT Linda Khangtha microgreen Learn what Bangkok heat and humidity do to sunflower microgreens at every stage — germination, hull removal, and harvest timing most guides get wrong. Bangkok window light spectrum across the day: AS7341 readings at 6am, 9am, 12pm, 3pm, and 6pm https://www.plantmood.farm/blog/window-light-spectrum-across-day-as7341-6am-9am-12pm-3pm-6pm https://www.plantmood.farm/blog/window-light-spectrum-across-day-as7341-6am-9am-12pm-3pm-6pm Mon, 27 Apr 2026 08:26:58 GMT Geert Warmenbol microgreen AS7341 spectral readings from Bangkok window light across the day. How F-channel ratios shift from dawn to dusk and what it means for microgreen grow timing. What nutrient lockout looks like in sensor data before the plant shows visual symptoms https://www.plantmood.farm/blog/nutrient-lockout-sensor-data-before-visual-symptoms-hydroponic https://www.plantmood.farm/blog/nutrient-lockout-sensor-data-before-visual-symptoms-hydroponic Mon, 27 Apr 2026 08:26:33 GMT Geert Warmenbol hydroponic How pH creep, EC plateau, and reservoir temperature signal nutrient lockout hours before leaf symptoms appear. Real sensor patterns from Bangkok grow cycles. Which microgreens sell: sunflower, pea, radish, broccoli, and wheatgrass ranked by margin https://www.plantmood.farm/blog/microgreens-that-sell-sunflower-pea-radish-broccoli-wheatgrass-margin-ranked https://www.plantmood.farm/blog/microgreens-that-sell-sunflower-pea-radish-broccoli-wheatgrass-margin-ranked Mon, 27 Apr 2026 08:26:08 GMT Linda Khangtha microgreen Real margin data on sunflower, pea, radish, broccoli, and wheatgrass microgreens in Bangkok. Which crops sell and which eat your time for thin returns. Why your harvest calendar is lying to you: the Q10 temperature problem in microgreens https://www.plantmood.farm/blog/microgreen-harvest-timing-temperature-growth-calculator https://www.plantmood.farm/blog/microgreen-harvest-timing-temperature-growth-calculator Mon, 27 Apr 2026 08:25:58 GMT Geert Warmenbol Tools Manual harvest dates fail when room temperature swings. Learn how a Q10 growth model predicts peak crisp timing before you miss the window. Why EC readings lie when pH is wrong and how the nutrient correction tool fixes the order problem https://www.plantmood.farm/blog/hydroponic-ec-ph-correction-order-nutrient-calculator https://www.plantmood.farm/blog/hydroponic-ec-ph-correction-order-nutrient-calculator Mon, 27 Apr 2026 08:25:31 GMT Geert Warmenbol Tools Adding nutrients into a broken pH wastes salts and produces false EC readings. Learn why pH must be fixed first, backed by grow log data and a correction tool. AS7341 spectrum readings by row: what light actually reaches lower hydroponic tower sites https://www.plantmood.farm/blog/as7341-spectrum-readings-hydroponic-tower-row-position https://www.plantmood.farm/blog/as7341-spectrum-readings-hydroponic-tower-row-position Mon, 27 Apr 2026 08:25:08 GMT Geert Warmenbol hydroponic Learn what AS7341 sensor data shows about spectrum loss across hydroponic tower rows and why lower sites receive a fundamentally different light fingerprint. What a mold event looks like in sensor data before you can see it: 8 documented incidents https://www.plantmood.farm/blog/what-mold-looks-like-in-sensor-data-before-you-can-see-it https://www.plantmood.farm/blog/what-mold-looks-like-in-sensor-data-before-you-can-see-it Mon, 27 Apr 2026 08:24:59 GMT Linda Khangtha microgreen Learn what humidity, moisture, and airflow readings signal mold in microgreen trays before it's visible, based on 8 documented grow incidents in Bangkok. The real electricity cost of running a hydroponic tower 24/7 in Bangkok: pump, lights, and fan measured https://www.plantmood.farm/blog/electricity-cost-hydroponic-tower-bangkok-pump-lights-fan https://www.plantmood.farm/blog/electricity-cost-hydroponic-tower-bangkok-pump-lights-fan Mon, 27 Apr 2026 08:24:35 GMT Geert Warmenbol hydroponic Real measured wattage and Bangkok electricity rates for hydroponic tower running costs. What a pump, grow light, and fan actually add to your monthly bill. What your microgreen tray actually earns: the cost assumptions growers get wrong https://www.plantmood.farm/blog/microgreen-profit-per-tray-real-cost-calculator https://www.plantmood.farm/blog/microgreen-profit-per-tray-real-cost-calculator Mon, 27 Apr 2026 08:24:08 GMT Geert Warmenbol Tools Most microgreen profit estimates skip labor, misread electricity, and ignore CapEx. See what a full bottom-up cost model reveals per cycle. Water temperature and germination speed in tropical climates: DS18B20 data across 30 cycles https://www.plantmood.farm/blog/water-temperature-germination-speed-tropical-climate-ds18b20-data https://www.plantmood.farm/blog/water-temperature-germination-speed-tropical-climate-ds18b20-data Mon, 27 Apr 2026 08:23:57 GMT Geert Warmenbol microgreen See what DS18B20 sensor data across 30 microgreen cycles reveals about water temperature and germination speed in Bangkok's tropical climate. The humidity sweet spot for sunflower microgreens in high-humidity climates https://www.plantmood.farm/blog/humidity-sweet-spot-sunflower-microgreens-high-humidity-climate https://www.plantmood.farm/blog/humidity-sweet-spot-sunflower-microgreens-high-humidity-climate Mon, 27 Apr 2026 08:23:33 GMT Linda Khangtha microgreen Learn what humidity range actually works for sunflower microgreens in Bangkok and why the standard 50-70% advice fails growers in tropical apartments. The failure log: every hydroponic problem encountered in 6 months and what fixed it https://www.plantmood.farm/blog/hydroponic-failure-log-six-months-problems-fixes https://www.plantmood.farm/blog/hydroponic-failure-log-six-months-problems-fixes Mon, 27 Apr 2026 08:23:07 GMT Geert Warmenbol hydroponic Six months of logged hydroponic failures in a Bangkok apartment -- root rot, EC drift, germination collapse, tip burn -- with the specific fix that worked. Does hydrogen peroxide affect EC readings? What the TDS sensor shows before and after https://www.plantmood.farm/blog/hydrogen-peroxide-reservoir-ec-tds-readings-hydroponics https://www.plantmood.farm/blog/hydrogen-peroxide-reservoir-ec-tds-readings-hydroponics Mon, 27 Apr 2026 08:22:57 GMT Linda Khangtha hydroponic Find out how hydrogen peroxide changes EC and TDS readings in hydroponic reservoirs, with before and after sensor data from real grow cycles in Bangkok. EC recovery curve after topping up a depleted reservoir: how long until readings stabilize https://www.plantmood.farm/blog/ec-recovery-curve-after-topping-up-depleted-reservoir https://www.plantmood.farm/blog/ec-recovery-curve-after-topping-up-depleted-reservoir Mon, 27 Apr 2026 08:22:35 GMT Geert Warmenbol hydroponic Discover how long EC takes to stabilize after topping up a hydroponic reservoir, and why reading too early produces dosing errors that compound across cycles. Water temperature in a reservoir on concrete in a 30°C room: daily highs, lows, and root oxygen https://www.plantmood.farm/blog/reservoir-water-temperature-concrete-30c-room-root-oxygen https://www.plantmood.farm/blog/reservoir-water-temperature-concrete-30c-room-root-oxygen Mon, 27 Apr 2026 08:22:08 GMT Linda Khangtha microgreen Real daily high and low water temperature readings from a reservoir sitting on concrete in a 30°C Bangkok room, and what those numbers do to root oxygen. The beginner's guide to EC and TDS: what they measure, why they differ, and what to target https://www.plantmood.farm/blog/beginners-guide-ec-tds-what-they-measure-why-they-differ-what-to-target https://www.plantmood.farm/blog/beginners-guide-ec-tds-what-they-measure-why-they-differ-what-to-target Mon, 27 Apr 2026 08:21:59 GMT Linda Khangtha hydroponic EC and TDS measure different things and use different conversion factors. Learn what each reading means, why they diverge, and what targets actually matter. The beginner's crop selection guide for hydroponic towers: what grows well vertically and what doesn't https://www.plantmood.farm/blog/beginners-crop-selection-guide-hydroponic-towers-what-grows-well-vertically https://www.plantmood.farm/blog/beginners-crop-selection-guide-hydroponic-towers-what-grows-well-vertically Mon, 27 Apr 2026 08:21:36 GMT Linda Khangtha hydroponic Discover which crops genuinely thrive in hydroponic towers and which will frustrate you. Real tray-level results from Bangkok growing conditions. The 6-variable daily fingerprint of a healthy hydroponic tower https://www.plantmood.farm/blog/hydroponic-tower-daily-fingerprint-ph-ec-temp-lux-humidity https://www.plantmood.farm/blog/hydroponic-tower-daily-fingerprint-ph-ec-temp-lux-humidity Mon, 27 Apr 2026 08:21:08 GMT Geert Warmenbol hydroponic Discover what pH, EC, water level, temperature, lux, and humidity readings look like on a healthy hydroponic tower day — with sensor data from Bangkok grows. The 5-variable fingerprint of a healthy microgreen tray: temperature, humidity, lux, and moisture by day https://www.plantmood.farm/blog/healthy-microgreen-tray-fingerprint-temperature-humidity-lux-moisture https://www.plantmood.farm/blog/healthy-microgreen-tray-fingerprint-temperature-humidity-lux-moisture Mon, 27 Apr 2026 08:20:58 GMT Linda Khangtha microgreen Learn the 5-variable daily fingerprint of a healthy microgreen tray -- temperature, humidity, lux, and moisture readings that signal a good crop before harvest. Sunflower microgreen germination rate when ambient temperature exceeds 32°C: Bangkok data https://www.plantmood.farm/blog/sunflower-microgreen-germination-rate-high-temperature-bangkok https://www.plantmood.farm/blog/sunflower-microgreen-germination-rate-high-temperature-bangkok Mon, 27 Apr 2026 08:20:36 GMT Geert Warmenbol microgreen Sensor data from Bangkok grow cycles shows how sunflower microgreen germination drops above 32°C and what interventions actually move the number back up. Substrate moisture vs mold incidence: data from 20 trays showing where the risk spikes https://www.plantmood.farm/blog/soil-moisture-mold-incidence-20-trays-threshold-data https://www.plantmood.farm/blog/soil-moisture-mold-incidence-20-trays-threshold-data Mon, 27 Apr 2026 08:20:09 GMT Linda Khangtha microgreen Data from 20 microgreen trays showing where substrate moisture triggers mold. The risk spike threshold, what drives it, and how to stay below it in Bangkok. Where to source hydroponic nutrients and growing equipment in Bangkok without paying import prices https://www.plantmood.farm/blog/hydroponic-nutrients-equipment-bangkok-local-sources https://www.plantmood.farm/blog/hydroponic-nutrients-equipment-bangkok-local-sources Mon, 27 Apr 2026 08:19:59 GMT Linda Khangtha hydroponic Learn where Bangkok growers actually buy nutrients, grow media, and equipment locally -- and which imports are still worth the price difference. The overnight sensor profile in April vs October: temperature, humidity, and lux across seasons https://www.plantmood.farm/blog/overnight-sensor-profile-april-vs-october-bangkok-grow-room https://www.plantmood.farm/blog/overnight-sensor-profile-april-vs-october-bangkok-grow-room Mon, 27 Apr 2026 08:19:35 GMT Linda Khangtha microgreen How Bangkok's April heat and October humidity change overnight grow conditions for microgreens — what the sensor logs show and what to adjust between seasons. Selling hydroponic produce in Bangkok: what restaurants will pay, what expats want, and minimum viable volume https://www.plantmood.farm/blog/selling-hydroponic-produce-bangkok-restaurants-expats-minimum-volume https://www.plantmood.farm/blog/selling-hydroponic-produce-bangkok-restaurants-expats-minimum-volume Mon, 27 Apr 2026 08:19:09 GMT Geert Warmenbol hydroponic Real pricing data and volume thresholds for selling hydroponic produce in Bangkok -- what restaurants actually pay and what the expat market will and won't buy. What the AS7341 actually reads from common grow lights: a channel-by-channel breakdown https://www.plantmood.farm/blog/as7341-spectral-sensor-readings-grow-lights-channel-breakdown https://www.plantmood.farm/blog/as7341-spectral-sensor-readings-grow-lights-channel-breakdown Mon, 27 Apr 2026 08:19:00 GMT Linda Khangtha microgreen Real AS7341 spectral sensor readings from cheap LED strips, horticulture panels, and Bangkok window light. What it means for your trays. Running a Bangkok hydroponic tower: yield, cost, and sales data from the grow logs https://www.plantmood.farm/blog/bangkok-hydroponic-tower-business-yield-cost-sales-real-data https://www.plantmood.farm/blog/bangkok-hydroponic-tower-business-yield-cost-sales-real-data Mon, 27 Apr 2026 08:18:33 GMT Linda Khangtha hydroponic What running a Bangkok hydroponic tower actually costs, produces, and earns -- real numbers from yield logs, electricity meters, and sales data across seasons. Seasonal grow cycle comparison: same crop, same tower, cool season vs hot season sensor profiles side by side https://www.plantmood.farm/blog/seasonal-grow-cycle-comparison-cool-season-hot-season-hydroponic-tower-bangkok https://www.plantmood.farm/blog/seasonal-grow-cycle-comparison-cool-season-hot-season-hydroponic-tower-bangkok Mon, 27 Apr 2026 08:18:00 GMT Linda Khangtha hydroponic How Bangkok cool and hot seasons change hydroponic tower yield, EC, pH, and root health. Real sensor profiles from the same crop across two seasons. High temperature and low dissolved oxygen compound to accelerate root rot: logged data from 3 incidents https://www.plantmood.farm/blog/high-temperature-low-dissolved-oxygen-root-rot-onset-hydroponic https://www.plantmood.farm/blog/high-temperature-low-dissolved-oxygen-root-rot-onset-hydroponic Mon, 27 Apr 2026 08:17:59 GMT Linda Khangtha hydroponic How high reservoir temperature and low dissolved oxygen combine to trigger root rot in hydroponic systems, with logged data from 3 Bangkok grow incidents. Root rot in hydroponic towers: early visual signs and how to recover without restarting https://www.plantmood.farm/blog/root-rot-hydroponic-towers-early-visual-signs-recovery-without-restarting https://www.plantmood.farm/blog/root-rot-hydroponic-towers-early-visual-signs-recovery-without-restarting Mon, 27 Apr 2026 08:17:34 GMT Linda Khangtha hydroponic Spot root rot in hydroponic towers before it kills the crop. Real recovery steps for Bangkok growers -- no full restart required if you catch it early.