Gardening Guides

Welcome to the Gardening Guides Hub
Explore our master collection of deep-dive tutorials covering soil chemistry, organic composting, and advanced plant care to maximize your yields.
🌱 Soil & Substrate Guides

Soil Fertilizer Timing Guide
Raised Bed Construction
Mulch & Substrate Mastery
Expert Composting Tips

📖 System Planning & Setup

Seed Germination Science
Tracking Plant Growth
Reservoir Capacity Rules
Using the Metric System

Interactive SaaS Calculators
Stop guessing your amendments. Use our free interactive tools!

Soil Fertilizer Calc
Mulch Layer Calc
Seed Germination Timer

  • How to Clean and Reuse Clay Pebbles (LECA/Hydroton): Complete Guide

    Home > Hydroponic Systems > How to Clean and Reuse Clay Pebbles (LECA/Hydroton): Complete Guide Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: How to Clean Clay Pebbles Yes, clay pebbles can be reused indefinitely! To clean them, first manually remove all dead root matter. Then, sterilize the pebbles to kill pathogens (like Pythium) by either boiling them in water for 15 minutes or soaking them in a strong 3% hydrogen peroxide solution for 24 hours. Finally, rinse them thoroughly with plain tap water to wash away any dissolved mineral salts, and let them dry completely before storage. Reusability Infinite (10+ Years) Best…

  • How to Build a DIY Ebb and Flow System from Scratch (Guide)

    Home > Hydroponic Systems > How to Build a DIY Ebb and Flow System from Scratch Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: What You Need for DIY Ebb & Flow To build a basic Ebb and Flow (Flood and Drain) system, you need two plastic containers (a shallow upper tray for the plants and a deep lower reservoir for the water). You will also need a submersible water pump, a digital timer to control the flooding schedule, and two bulkhead fittings (one for the pump inlet, and one as an overflow drain). The timer turns the pump on to flood the…

  • When to Harvest Hydroponic Lettuce (Signs & Schedule)

    Home > Hydroponic Systems > When to Harvest Hydroponic Lettuce (Signs & Schedule) Last Updated: July 2026  |  Reviewed for post-harvest plant physiology, sugar translocation, and shelf-life optimization Quick Answer: Harvest hydroponic lettuce early in the morning just before grow lights turn on, when leaves are completely turgid and sugar content is highest. For loose-leaf varieties, begin cut-and-come-again harvesting at 21 to 28 days post-transplant when outer leaves reach 4 to 6 inches long. For full heads (butterhead or romaine), harvest at 30 to 38 days when the center rosette feels firm before the central stem elongates into a bitter seed stalk (bolting). Calculate exact pre-harvest EC and water targets…

  • How to Increase Hydroponic Tomato Yield

    Home > Hydroponic Plants > How to Increase Hydroponic Tomato Yield Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: How to Maximize Tomato Yields To exponentially increase your hydroponic tomato yield, you must focus on three things: 1. Aggressive Pruning (removing all side “suckers” to force the plant to grow vertically on a single main vine), 2. Manual Pollination (vibrating the flower trusses daily with an electric toothbrush to ensure 100% fruit set), and 3. Boosting DLI (providing a Daily Light Integral of 30+ mol/m²/day). Finally, increasing the Potassium-to-Nitrogen ratio during the flowering stage will bulk up the fruit size dramatically. Target DLI…

  • Growing Microgreens Hydroponically: Beginner’s Guide

    Home > Hydroponic Plants > Growing Microgreens Hydroponically: Beginner’s Guide Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: How to Grow Microgreens Hydroponic microgreens can be harvested in just 10 days. Simply soak a specialized hemp or biostrate mat in plain pH-balanced water (5.5) and lay it flat in a shallow 10×20 tray. Heavily broadcast your seeds across the wet mat, then cover the tray with a blackout dome for 3 to 4 days to force germination and vertical stretching. Once the sprouts are 2 inches tall, remove the blackout dome, expose them to light for 5 days so they turn dark green,…

  • How to Prevent Algae in Hydroponic Systems

    Home > Hydroponic Systems > How to Prevent Algae in Hydroponic Systems Last Updated: July 2026  |  Reviewed for aquatic microbiology, light extinction coefficient, and water chemistry accuracy Quick Answer: To permanently prevent and eliminate algae in hydroponic systems, apply four foundational rules: (1) Block 100% of light from hitting the nutrient solution using opaque reservoirs, reflective panda film, or neoprene collars; (2) Chill reservoir water below 66°F (19°C) to maximize dissolved oxygen and slow algal cell division; (3) Sanitize sterile systems with food-grade 29% hydrogen peroxide (1 mL per gallon every 4 days) or hypochlorous acid; or (4) Inoculate organic reservoirs with beneficial Bacillus microbes that competitively outconsume algae….

  • Ebb and Flow Hydroponics: The Complete Guide

    Home > Hydroponics > flood tray hydroponics: The Complete Guide Quick Answer: Known for extreme reliability, hydroponic flood table (also called Flood and Drain) works by periodically pumping nutrient-rich water from a lower reservoir into an upper tray, soaking the roots. The pump then turns off, allowing gravity to drain the water away, which physically pulls massive amounts of fresh oxygen down into the root zone. What Most Guides Miss (And What You Will Learn Here) The exact science of how the draining action acts as an oxygen piston for the roots. The specific components needed to build a reliable ebb and flow setup. The exact timing intervals for flooding,…

  • How to Grow Spinach Hydroponically at Home: A Beginner’s Guide

    Home > Hydroponic Systems > How to Grow Spinach Hydroponically at Home (Complete Guide) Last Updated: July 2026  |  Reviewed for horticultural and germination accuracy Quick Answer: To grow hydroponic spinach successfully indoors, overcome its natural low germination rate by cold-stratifying seeds in a refrigerator (40°F/4°C) between moist paper towels for 5 to 7 days before sowing. Grow in a Nutrient Film Technique (NFT) or Deep Water Culture (DWC) system with a strict water temperature between 62°F and 66°F (16°C–18°C), pH between 5.8 and 6.2, and nutrient EC of 1.4 to 1.8 mS/cm. Keep daily LED light duration strictly under 13 hours per day to prevent premature bolting and bitterness….

  • Soil Fertilizer Timing Guide: When to Apply NPK, Top-Dress, and Fix Deficiencies

    Home > Gardening Guides > Soil Fertilizer Timing Guide: When to Apply NPK, Top-Dress, and Fix Deficiencies When to apply NPK, how often to top-dress compost, and how to read plant deficiency signs before your crops suffer Key Takeaways Quick Answer: Error generating content. Apply a balanced NPK fertilizer (10-10-10) 2 weeks before planting and again every 4–6 weeks during the active growing season — not at every watering. Top-dressing with 1 inch of compost every 6 weeks replenishes organic matter and adds slow-release nitrogen equivalent to roughly 0.5 lbs of 10-0-0 fertilizer per 10 sq ft. Nitrogen deficiency shows as yellowing that starts on the oldest (lowest) leaves and…

  • Raised Bed Gardening Guide: How to Build, Fill & Manage Your Beds

    Home > Gardening Guides > Raised Bed Gardening Guide: How to Build, Fill & Manage Your Beds Building, filling, and managing raised beds for year-round vegetable production Insights Most Growers Overlook Embrace the Power of Deep Roots: While many focus on surface crops, incorporating deep-rooted vegetables (like carrots, parsnips, or even daikon radishes) can naturally break up compacted layers, improve soil structure, and bring up nutrients from deeper within your raised bed, benefitting subsequent crops. Strategically Use Living Mulches/Groundcovers: Instead of bare soil, plant beneficial living mulches or low-growing groundcovers between your primary crops. This helps suppress weeds, retain moisture, regulate soil temperature, and some can even fix nitrogen or…