Seed cylinders, cakes and bells

A seed cylinder is exactly what it sounds like: ordinary bird seed, pressed with a binder into a solid block with a hole through the middle, sold to be slid onto a rod and hung up. Cakes and bells are the same idea in different shapes.

People either love them or think they are a con, and both camps have a point. This page is the arithmetic that separates the two, because the format solves a real problem and charges a real premium for it.

What the format genuinely solves

Two things, and the first one is the reason anybody pays the premium.

Nothing gets flicked out. The most wasteful thing birds do at a feeder is sort — they push aside what they do not want to reach what they do, and that rejected seed ends up on the ground. With a pressed block there is nothing loose to push. Birds pick at the face of it and take what comes away.

That matters more than it sounds, because seed on the ground is the start of most of the problems this site writes about: it sprouts, it molds, and it is what actually draws rodents. The rodent mechanism is spillage, not the feeder, and the patch under the feeder has the same cause. A cylinder addresses both at source.

It lasts. A tube of loose seed can be emptied in a morning by a flock. A four-pound block cannot — birds can only work at it so fast. If your complaint is that you are refilling every day, this genuinely fixes it.

What it costs

Now the other side, stated plainly because nobody selling these does.

Pressed blocks cost several times more per pound than the equivalent loose seed. A four-pound cylinder and a twenty-five-pound sack of straight black-oil sunflower are in the same rough price bracket — which means, per pound, the cylinder is a different class of purchase entirely.

That is the number to run before you buy, and it is why the sack of sunflower is in our picks above. It is not there as a joke; it is the honest comparison. We publish the cost formula rather than a made-up monthly figure — divide the block price by its weight and compare it with your usual bag.

How we ranked these

On published listing weights and formats, and on how the product behaves once it is hanging up — no testing claim, because we have not run one. Within that we weighed four things: whether the listing states a weight at all (many do not), how long the block realistically lasts, whether it needs an extra purchase to hang, and how badly it suffers in rain. Full criteria here.

We could not weigh one thing we normally treat as central: ingredients. A seed bag carries an ingredient panel you can check for milo and cracked corn. Most pressed blocks do not itemize, and none of our picks does. That is a genuine gap in the category rather than an oversight here, and it is why the skip box above is about opacity. The filler check you can run on a seed bag simply is not available on most of these.

Which birds actually use them

Broadly, the birds that like to cling and work at a surface do best: chickadees, titmice, nuthatches, woodpeckers and finches all take to a block readily, because picking at a vertical face is close to what they already do on bark.

Cardinals and jays manage but are less comfortable, for the reason that runs through this whole site — they are heavy birds that prefer somewhere to stand. A block on a rod gives them nothing to perch on unless the feeder has a tray. Cardinals want a flat surface, and a cylinder is the opposite of that.

Nut-heavy logs shift the mix further toward woodpeckers and nuthatches, which is worth knowing if those are the birds you are after — though a suet cage is still the cheaper route to them.

The rain problem

This is the failure mode nobody warns you about, and it is specific to the format.

A pressed block is held together by a binder. Get it repeatedly wet and it softens, crumbles and falls off the rod in chunks — at which point you have converted an expensive tidy product into a pile of loose seed on the ground, which is the exact thing you paid a premium to avoid.

So a roof is not optional here in the way it is with loose seed in a tube. Either buy a cylinder feeder with a cover, or hang the block somewhere genuinely sheltered. Our page on keeping seed dry covers domes and roofed feeders, and the advice applies with more force to a block than to a tube.

The bell format is the most exposed of the lot, because it hangs bare by design. That is the trade for needing no feeder.

Squirrels, predictably

A pressed block is a solid object with nuts in it, hanging in the open, attached to nothing. It is close to the ideal squirrel target, and nut-heavy logs are the worst of the lot.

There is no mechanism here to help you — no weight shroud, no cage, nothing. Everything therefore falls to placement, exactly as it does with a suet cage: a pole, a long baffle, and real distance from anything jumpable. Baffle sizing is here, and our general position on squirrel-proofing applies unchanged.

One point in the format's favor: a squirrel cannot empty a cylinder the way it can empty a tube. It has to work at the block, which slows it down considerably. Slower is not the same as stopped, and an unsecured block is simply carried off whole.

Cleaning, which is easier than usual

A rare win. There is no reservoir of seed sitting in a chamber, no ports clogging with seed dust, and nothing to strip down — the food is the object, and when it is gone there is a bare rod to wipe.

Project FeederWatch asks for seed feeders to be cleaned every week or two and more often in heavy use or wet weather. A cylinder holder meets that with a rinse rather than a twenty-minute disassembly, which is genuinely one of the better arguments for the format. The routine is here.

Do clear whatever crumbles off underneath, though. Fragments accumulate below a block the same way hulls do below a tube, and they behave the same way once wet.

So who should buy one?

Four situations where we think it is genuinely the right call:

• Mess is the actual complaint. A deck, a patio, a small garden, a neighbor who notices — this is the format's home ground, and it beats even a no-mess hulled mix because nothing is dropped at all.
• You are away regularly. A large log outlasts a tube by a wide margin.
• You want to feed birds without running a feeding station. A bell on a hook is the whole setup, with no hardware and no maintenance.
• As a gift, or a way in. It is the least intimidating version of this hobby — nothing to assemble, nothing to fill.

And who should not: anyone feeding on a budget, anyone running several feeders, and anyone whose main aim is maximum birds per dollar. For all three, straight black-oil sunflower in a plain tube on a baffled pole wins, and it is not close. Our seed roundup compares the bags.

What each pick costs you

• The cylinder is far dearer per pound than loose seed and does not itemize its ingredients, so the filler check is unavailable.
• The holder is a second purchase on top of an already expensive food, and it has no squirrel mechanism of its own.
• The seed cake is small, so it disappears fast at a busy station.
• The nut log is heavy enough to need a hanger that can take it, and nut-heavy blends are what squirrels want most.
• The bell hangs unprotected, so rain gets at it, and it is the most expensive seed per pound on this entire site.
• The sack of sunflower is here as the honest comparison and it leaves hulls that will kill the grass beneath the feeder.

The pattern this site keeps arriving at holds here too: you are not choosing between good and bad products, you are choosing which cost you would rather pay. With pressed seed the cost is money, and what you buy with it is tidiness and time.