How often to water succulents
The jade plant came from my coworker's cutting, rooted in a jam jar, and I potted it up feeling very proud of myself. I put it on the windowsill next to my pothos and did what seemed obvious: watered them both every Sunday morning with my coffee, like a little ritual. The pothos loved it. The jade plant, over about six weeks, turned into something sad and translucent, its lower leaves going soft and yellow-brown at the same time, like they were bruising from the inside.
I did what most people do when a succulent looks bad: I assumed it was thirsty. Succulents are desert plants, right, they must want more water, more sun, more attention. So I watered it a little more. Within a week I had a ring of tiny black flies hovering over the pot every time I walked past, and the stem near the soil line had gone soft enough that I could dent it with a fingernail. That's when I finally stopped guessing and pulled it out of the pot.
The part where I made it worse
The roots were brown and mushy at the tips, and the soil — a full week after I'd last watered it — was still cold and wet a couple inches down. I had been reading the drooping, sad leaves as a thirst signal, but overwatered and underwatered plants look almost identical on top: both droop, both yellow, both look like they need help. The soil is the only honest witness, and I hadn't once actually checked it. I'd just watered on the day my calendar told me to.
The fungus gnats were the tell I ignored longest. Those little black flies aren't random bad luck — they lay their eggs in topsoil that stays damp, and mine had been staying damp for a week at a time because I kept adding water before the last round had ever left. I was, without meaning to, running a wet-soil breeding operation for a plant that evolved to survive months without rain.
So how often to water succulents, actually
Here's the number I wish someone had told me on day one: succulents and cacti want the soil dry all the way to the bottom of the pot before you water again — a moisture reading down near zero, not just "the top inch feels dry." Watering while the soil underneath is still even mildly damp is the actual cause of most succulent deaths, not neglect. For a lot of people that works out to once every two, three, sometimes four weeks depending on pot size, mix, and the season, which is a wildly different rhythm than the weekly watering that keeps a pothos happy a foot away on the same windowsill.
That's the trap, honestly — the schedule itself. Every pot dries at its own rate depending on the plant, the pot size, the mix, the temperature, and the time of year, so the same watering can that's correct for your monstera in July is a slow drowning for your jade plant year-round. Winter makes it worse: most houseplants need 30 to 60 percent less water once the days shorten and things cool down, and a schedule that felt fine in summer will actively rot roots in January because nobody adjusted it. I'd also repotted that jade cutting into a pot a size bigger than it needed, which meant it was holding moisture far longer than the little jam jar ever had — the same mistake that turns a plant drying out in four days into one that stays wet for three weeks.
The meter, and the moment the guessing stopped
What actually fixed it was ridiculously unglamorous: a digital four-in-one soil probe I stuck in the pot before doing anything else. First reading, a week after I'd repotted the survivors into a smaller, faster-draining pot: 38 percent, still plenty wet. I waited. Checked again five days later: 19 percent. Waited again. It took almost three full weeks that first time to see the reading finally bottom out.
A succulent wants water when the soil falls below roughly 8% — the very bottom of a digital four-in-one's 0–100% moisture range, dry all the way to the base of the pot. Above about 30% it is not asking for anything. If the probe still reads 40% after a week, that pot does not need you, no matter what the leaves are doing.
Compare that to a pothos a foot away on the same windowsill, which wants a drink once it drops below about 25%, and you can see why one watering can on one Sunday kills one plant and delights the other. The full band for this one, and what it means in the gritty mix succulents usually live in, is on the succulent meter page — that page is the reference, this post is the story of learning to use it. Read the figures as bands, not precise thresholds: these are unpowered conductivity probes, two of them in the same pot will disagree, and fertilizer salt raises the number without any extra water present. Your own pot's direction over a week is the trustworthy part.
That's the part that finally made the whole thing click: I wasn't bad at keeping succulents alive, I just didn't have a way to see what the soil was actually doing, and I was substituting a guess ("it's Sunday") for a fact ("it's still wet down there"). That's the entire idea behind Plant Tender — you walk one meter around to your pots, point your phone camera at the reading, and the app judges it against that specific plant's actual needs, keeping a log so you notice when a plant that used to dry out in a week is suddenly holding water for three. Why one meter and a camera beats a sensor in every pot, how to choose one, and the ten-minute setup.
Common questions
How often should I water succulents indoors?
There isn't a fixed interval worth trusting, but for most people indoors it works out somewhere between every two and every four weeks — and the honest version is "when the pot is dry to the bottom, however long that takes." Pot size, mix, light and season all move it. A succulent in a small terracotta pot in a bright window might genuinely be ready in ten days; the same plant in a big glazed pot in a dim room can sit wet for a month.
Should I water a succulent with wrinkled or shrivelled leaves?
Check the soil first, because wrinkling is not a reliable thirst signal on its own. Genuinely dehydrated succulents wrinkle, but so do succulents whose roots have rotted and can no longer take up the water sitting right there in the pot — same look, opposite cause. If the leaves are wrinkling and the soil is dry to the bottom, water it. If they're wrinkling and the soil is damp, you have a root problem, not a watering problem.
How much water do succulents need when you do water them?
Soak thoroughly rather than sipping. Water until it runs out of the drainage hole, then don't water again until the whole pot has gone dry. Frequent small waterings are worse than infrequent big ones: they keep the top of the pot permanently damp, which is where fungus gnats breed and where rot starts, while never actually reaching the deeper roots.
Do succulents need less water in winter?
Yes, and by a lot. Most houseplants drop thirty to sixty percent in water use once days shorten and indoor temperatures fall, and succulents are at the far end of that. A summer rhythm carried into January is one of the most common ways a healthy succulent rots. The fix isn't a new winter schedule — it's checking the soil and letting the interval stretch on its own.
The close
The jade plant survived, minus the rotted section I cut away, and it's back to being smug and fat-leaved on that windowsill. These days I water it maybe once a month, sometimes less in winter, and only after the meter tells me the whole pot has gone properly, boringly dry.