Guide
How Self-Watering Planters Actually Work
The mechanism in four steps, plus the air gap that keeps roots out of the water.
Guide library
Plant Care Guides
Every guide and comparison on this site, grouped by the problem it solves rather than by product category.
The short answer
This library covers four things: how often to water and how to tell when, what to do when a plant is already dying, how the watering devices actually work, and what each one honestly cannot do. Every horticultural claim is cited to a university extension service or the RHS.
Where to start, by what has gone wrong
| If this is you | Start here |
|---|---|
| My plant is dying right now | Overwatered or underwatered |
| I never know when to water | How often to water houseplants |
| I am going away next week | The one-week vacation checklist |
| I bought globes and they did not work | Do watering globes actually work |
| I want to stop having to remember | Are self-watering pots worth it |
| I keep drowning things | Signs of overwatering |
The two facts most of this library rests on
Watering frequency is published, and it varies by a factor of four. Virginia Cooperative Extension gives tropical houseplants as needing water sometimes once or twice a week, and succulents and cacti as once or twice a month. Almost every “how often” question resolves to which band your plant is in.
Watering thoroughly means watering to drainage. The same publication is explicit: wet the potting soil all the way through and let the container drain until water stops dripping out the bottom, then do not leave it standing in water for more than 60 minutes. Little-and-often watering is the single most common cause of the problems in the rescue section.
Everything else here is a consequence of those two facts, plus the arithmetic on the methodology page.
I want a pot that does it for me
Self-Watering Planters
A reservoir under the soil is the most durable fix for forgetting. How long one actually lasts is a division problem, and almost nobody publishes the numerator.
Guide
Are Self-Watering Pots Worth It?
The honest yes-or-no, including the three readers who should not buy one.
Guide
Self-Watering Pots and Root Rot
The honest answer to the biggest objection, with the pathogens named and the errors listed.
Head to head
Self-Watering Pots vs Regular Pots
The honest head to head, including the three categories where an ordinary pot wins.
Head to head
Wicking Pots vs Sub-Irrigated Reservoir Pots
Two mechanisms sold under one name, and how to tell which one you have bought.
I am leaving on Friday
Vacation Watering
The right answer depends entirely on how long you are gone and how big your pots are. Both of those are numbers, which makes this a numbers problem.
Guide
The One-Week Vacation Plant Checklist
A dated seven-day checklist, from water budget to the final morning routine.
Guide
Before You Leave: Cutting the Water Demand
The free demand-cutting measures, and how to brief a plant sitter properly.
Guide
How Long Can Houseplants Go Without Water?
Published cadences by plant type, and the pot-size effect nobody mentions.
Head to head
DIY Vacation Watering vs Buying a System
String wicks, bottles and bathtub trays honestly compared against bought kit.
Head to head
Globes vs Drip Systems vs Wicking
The three mechanisms compared on volume, responsiveness and failure mode.
I want the cheap fix
Watering Globes and Spikes
The cheapest fix in the category, and the one with the widest gap between what is advertised and what the volume can support.
Guide
Do Watering Globes Actually Work?
The quantified answer, with the arithmetic and the one published first-hand account.
Guide
How to Use Watering Globes and Bulbs Properly
Fill, insert and maintain them properly - including the angle mistake that halves their life.
Guide
Which Plants Suit Watering Globes?
Plant-by-plant compatibility, driven by the published cadence band rather than folklore.
Head to head
Watering Globes vs Terracotta Spikes
The head to head on capacity, throttle behavior and whose claims survive checking.
Head to head
Plastic vs Glass Watering Globes
What the material actually changes, and the one thing it does not.
I want to stop guessing
Moisture Meters
Watering on a schedule is what kills plants. A meter replaces the schedule with a reading, and that swap is the whole trick.
Guide
Are Soil Moisture Meters Accurate?
What the number actually is, the three things that skew it, and why they still help.
Guide
How to Use a Soil Moisture Meter
Insertion depth, placement, timing and what the reading means for each plant type.
Guide
Moisture Meter Not Working: Faults and Fixes
Stuck needles, always-wet and always-dry readings - what each one actually means.
Head to head
Analog vs Digital Soil Moisture Meters
Same sensor, different display - and why the decimal place is false precision.
Head to head
Moisture Meter vs the Finger Test
The free option versus the bought one, with the four cases where the meter wins.
My plant is dying right now
Plant Rescue
Overwatering and underwatering look almost identical from above the soil. Start here, work out which one you have, and then fix it.
Guide
How to Save an Overwatered Plant
The six-step rescue sequence, with sources, and prevention only after the plant is stable.
Guide
Root Rot Treatment for Houseplants
What root rot is, how to identify it, and the full mechanical treatment procedure.
Guide
Bottom Watering: How Often and How Long
How long to soak, how often, and the salt build-up that means you still need to top-water sometimes.
Guide
Signs of Overwatering
Every published overwatering symptom, in the order they typically appear.
Reference
Overwatered vs Underwatered: How to Tell
The symptom table, the four checks that separate them, and what to do for each.
Reference
How Often Should You Water Houseplants?
Published cadence bands, the factors that shift them, and how to water properly.
Head to head
Dry or Overwatered? The Ten-Second Test
Three physical checks and the immediate action for each result. The emergency version.