What's the difference between Monstera deliciosa and adansonii?

Look at where the gaps in the leaves go. On a mature monstera (Monstera deliciosa), the splits run all the way out to the edge of the leaf, and those leaves get big, sometimes the size of a dinner plate. On a Swiss cheese vine (Monstera adansonii), the leaf stays small and the gaps are closed oval holes punched through the middle, never breaking the rim. That one tell sorts most plants in a second, but it quietly fails in the two situations buyers actually meet: a young monstera hasn't split yet and looks just like a Swiss cheese vine, and a fair share of the plants sold as "adansonii" are something else entirely.

How can I tell them apart at a glance?

Pick the leaf up and look at the holes. If a split starts at the edge and cuts inward toward the central vein, you're holding a monstera. If every gap is a self-contained hole sitting inside an unbroken leaf outline, it's a Swiss cheese vine. This is the single most reliable difference, and it works even when the two plants are sitting side by side under bad store lighting.

Leaf size backs it up. A monstera leaf, once the plant matures, can reach 60 to 90 cm long. A Swiss cheese vine leaf tops out around 10 to 25 cm. So a huge glossy leaf with splits to the rim is almost certainly a monstera, and a small leaf covered in neat oval windows is almost certainly a Swiss cheese vine.

Texture and the stem give you two more checks. Monstera leaves are thick, stiff, and high-gloss, like polished leather. Swiss cheese vine leaves are thinner and a little crinkled, with a softer, more papery feel. And where each leaf joins the stem, a mature monstera grows a ruffled, wrinkled knuckle (the geniculum, the joint the leaf pivots on), while the same joint on a Swiss cheese vine stays smooth and straight.

The holes themselves are the same trick at two scales. Both plants grow in the broken shade of the forest, climbing up trunks toward the light, and both punch gaps in their leaves to let the patchy beams that make it through the canopy reach the leaves lower down rather than getting blocked by the top of the plant. The monstera just keeps going, splitting the leaf further and further until the gaps run clean off the edge.

Is a plant labeled "adansonii" actually an adansonii?

Often it isn't, and the confusion runs in two directions. A lot of small vines get sold under the names "adansonii," "Monkey Mask," or "Swiss cheese vine" without anyone checking which plant is actually in the pot, so the label tells you less than you'd hope.

The plant most often mixed up with a Swiss cheese vine is Monstera obliqua. It's genuinely rare, grows painfully slowly, and costs far more, which is exactly why a mislabeled one is worth catching before you pay. The tell is how much leaf is left. A true Swiss cheese vine has solid green leaf around its holes, maybe 70 percent leaf to 30 percent hole. An obliqua leaf is so heavily perforated it looks more like a paper doily, thin to the point of translucence, with the holes taking up most of the surface. If a vine being sold to you as a pricey rarity still has plenty of leaf between its holes, it's an ordinary Swiss cheese vine wearing a fancier name.

The other swap goes the other way. Some sellers list a Monstera deliciosa borsigiana, a faster, slightly smaller form of the regular monstera, as an "adansonii." That one's easy to catch: borsigiana splits to the edge like any monstera, so if the leaf's gaps reach the rim, it isn't a Swiss cheese vine no matter what the tag says. The trade names get tangled because the same handful of monstera species circulate under a dozen different labels, which is how an ordinary plant ends up wearing a rare plant's name.

Which one should I buy for my space?

Match the plant to the spot. A monstera is a floor plant. It climbs, the leaves get large, and it eventually wants a moss pole or a stake to clamber up, so it earns its keep filling a corner or standing as the green centerpiece of a room. Give it a couple of square feet of floor and headroom to grow upward.

A Swiss cheese vine is a shelf-and-ceiling plant. Left alone it trails, so it looks best spilling out of a hanging pot or draping off the top of a bookshelf, and it'll also climb a small trellis if you'd rather train it upward. It stays compact, which makes it the easier pick for a flat without much floor to spare.

Difficulty barely enters into it. Both are forgiving plants that tolerate normal indoor conditions, with the monstera a touch more relaxed about dry household air than the thinner-leaved Swiss cheese vine. So the choice comes down to the look you're after and the space you have, not to one being harder than the other. Either way, bright indirect light, a soak only once the top inch of soil dries, and a support to climb cover most of what keeps a monstera healthy indoors.

Why doesn't my young deliciosa have any splits yet?

Because the splits arrive with age, not at birth. A young monstera puts out whole, heart-shaped leaves with no holes at all, and they look a great deal like a Swiss cheese vine's foliage, which is exactly how a small unsplit plant gets misjudged at the store. The plant isn't failing. It just hasn't started splitting yet.

Three things bring the splits on: maturity, light, and something to climb. As the plant ages and gets enough bright, indirect light, each new leaf comes out larger and more deeply cut than the last, and giving it a moss pole to climb speeds the whole thing up because the plant reads the upward growth as a cue to switch over to its adult, split-and-holed leaves. The same monstera looks like two different plants at one year and at five.

You can still tell a juvenile monstera from a Swiss cheese vine before any splits appear. Look at size and the stem. A young monstera's whole leaves are already broader and thicker than a Swiss cheese vine's, and the stem joint is beginning to thicken into that ruffled knuckle, while a Swiss cheese vine of the same age is putting out small, thin leaves that already carry their enclosed holes. So the difference a shopper sees between these two plants is really one strategy photographed at different sizes and stages: the same holes punched to catch the same broken forest light, on a small vine that keeps its gaps tidy and on a big climber that splits its leaves until the gaps run off the edge.