The 8 Best Garden Auger Drill Bits Under $50 for Bulbs, Seedlings and Posts, Ranked & Reviewed

Our verdict: Two augers, 1.6 and 3.5 inches wide, covering bulbs through bedding plants for under $25.

The TCBWFY set pairs a 1.6 by 16.5 inch auger with a 3.5 by 16 inch auger, both for a 3/8 inch hex drive drill. The listing calls it heavy duty and a bulb planter, and it fits any drill with a chuck that grips a 3/8 inch hex shank.

It takes first place because two diameters solve most of a gardener's tasks. The narrow bit is right for tulip and daffodil bulbs, garlic cloves and small seedlings, and the wide one makes holes for pots-worth plants, perennials and smaller shrubs. The tradeoff is that the 3.5 inch bit takes real torque, and a light drill will bog down.

Buy it if you plant a bit of everything and want one purchase to cover it. Skip it if you only plant tiny bulbs, where a single narrow bit is enough.

Sizes

1.6 x 16.5 in and 3.5 x 16 in

Shank

3/8 in hex

Use

Bulbs and planting holes

Bracket

Under $25

Our verdict: A matched 1.6 and 3.5 inch pair, both 16 inches long, under $25.

The K-Brands set gives you a 1.6 by 16 inch auger and a 3.5 by 16 inch auger. The listing offers few other details, but the sizes are what matter: a narrow bit for bulbs and a wide one for bigger holes.

It lands second because the sizes closely match the TCBWFY pair, and the difference is a half inch of length on the narrow bit and a bit less listing detail. A 16 inch bit is plenty for planting bulbs at the usual depth, and it reaches well below the frost line in most gardens. The wide auger shares the torque demands of any bit that size.

Buy it if you want a well-sized pair from a brand that offers the same shapes in single-size listings too. Check the drill's chuck size before you order.

Sizes

1.6 x 16 in and 3.5 x 16 in

Pack

2 augers

Drive

3/8 in hex

Bracket

Under $25

Our verdict: A 4 by 16 inch auger that doubles as a post hole digger for small jobs.

The SYITCUN is a single 4 by 16 inch auger on a 3/8 inch hex shank, sold as a bulb planter and a post hole digger. A 4 inch diameter is wide enough for small shrubs, a mailbox-style stake or a lightweight fence post.

It ranks third because wide holes are the most demanding job for a hobby drill. Torque grows quickly with diameter, and a 4 inch bit will stall a weak drill or twist your wrist if it catches a root. Used with a corded or high-torque cordless drill at a low speed, it digs quickly in loose soil. In compacted clay or stony ground, expect to pull the bit out often to clear it.

Buy it if you plant mid-sized shrubs or set small posts and own a strong drill. Skip it for bulbs, where a narrower bit digs cleaner holes.

Size

4 x 16 in

Shank

3/8 in hex

Use

Planting and small posts

Bracket

Under $25

Our verdict: A shorter 4 by 12 inch auger that is easier to control than the 16 inch versions.

This K-Brands auger measures 4 by 12 inches and uses a 3/8 inch hex shank. It is the same diameter as the SYITCUN but four inches shorter.

It ranks fourth because length affects control. A shorter bit sits closer to the chuck, flexes less and is easier to start in a straight line, which helps when you are drilling a shallow bed for annuals or herbs. The cost is depth: 12 inches limits you to modest planting jobs, and it will not reach the deeper holes some shrubs and trees want.

Buy it if you want a wide hole but never plant deep. Pick the longer SYITCUN if depth matters.

Size

4 x 12 in

Shank

3/8 in hex

Use

Wide planting holes

Bracket

Under $25

Our verdict: A 2 inch by 14.5 inch auger sitting between bulb bits and wide planting augers.

The MAXCCINO measures 2 inches in diameter and 14.5 inches in length, with a 3/8 inch hex drive. At 2 inches it sits just above the 1.6 inch bulb bits, which is useful for bigger bulbs, small perennials and seedling plugs.

It ranks fifth because it is a single mid-size bit with no companion, so you will still want another size for other jobs. It asks for less torque than a 4 inch bit, which makes it easier on a modest cordless drill. The listing also uses post hole digger wording, which is optimistic for a 2 inch bit, since that is only really suitable for thin stakes.

Buy it if your planting sits in the middle: bigger bulbs, young perennials and small plants. Skip it if you want a narrow bit for tiny bulbs.

Diameter

2 in

Length

14.5 in

Shank

3/8 in hex

Bracket

Under $25

Our verdict: A single 1.6 by 16.5 inch bulb auger with extended length, for 3/8 inch hex drills.

This TCBWFY bit is the single narrow auger from the same brand as the set. It measures 1.6 by 16.5 inches, uses a 3/8 inch hex shank, and the listing positions it for bulbs and flowers.

It ranks sixth because the set above gives you this bit plus a second size for only a little more. If you only plant bulbs, it is the right tool, since a 1.6 inch hole is wide enough for most bulbs and narrow enough to keep the soil in place. The extended length helps you reach planting depth in one pass without bending over.

Buy it if bulbs are the only job and you own a modest drill. If you plant anything bigger, step up to the two-size set.

Size

1.6 x 16.5 in

Shank

3/8 in hex

Use

Bulbs and flowers

Bracket

Under $25

Our verdict: A 1.6 by 16.5 inch plant auger written up for cordless drills and bulbs.

The SORANGEUN measures 1.6 by 16.5 inches and is described as a plant auger for cordless drills. The listing gives few other details, so the shank, material and flute design are not confirmed beyond what the title says.

It ranks seventh because it matches the TCBWFY single bit in size but gives less proof of build quality. A narrow auger is a simple tool, and the differences between brands show up in thread depth, weld strength and finish, none of which the listing documents. A cordless drill with a 3/8 inch chuck is a good fit for this size.

Buy it if the price is lower than the TCBWFY on the day you shop. Otherwise, take the better-documented bit.

Size

1.6 x 16.5 in

Drill

Cordless drill

Use

Bulbs and small holes

Bracket

Under $25

Our verdict: An unbranded 1.6 by 16.5 inch auger with a 3/8 inch hex drive.

This is a generic 1.6 by 16.5 inch garden auger that fits a 3/8 inch hex drive. The listing has no brand story and no material detail.

It ranks last because it offers the same dimensions as two ranked pieces above with less backing. Without a named maker, you cannot compare weld quality or finish, and returns are the only protection if the bit arrives bent or with a rough thread. At this price, that risk is small.

It makes sense as a throwaway bit for a one-off bulb planting project. If you plan to dig every season, a better-documented option is worth the few extra dollars.

Size

1.6 x 16.5 in

Shank

3/8 in hex

Brand

Unbranded

Bracket

Under $25