- Species
- Liriodendron tulipifera (yellow poplar, tulipwood)
- Janka
- About 540 lbf
- Density
- About 455 kg/m³
- Stability
- Medium
- Relative cost
- Low
- Target moisture
- 6 to 9 percent for heated interiors
Materials / Temperate hardwood
Yellow Poplar: Paint Grade Hardwood, Grades and Specs
Light, soft for a hardwood and easy to machine. The usual paint grade hardwood for furniture, drawer parts, frames and mouldings.
Yellow poplar is the paint grade hardwood of North America. It comes from the tulip tree of the eastern United States, a tall, fast growing tree that yields long, wide, straight boards at a low price. In Europe the same wood is often sold as American tulipwood. Despite the name, it is not a true poplar of the Populus genus.
Poplar is soft for a hardwood, light in weight and machines very cleanly, and it glues and paints well. Those traits make it the standard choice for painted furniture, upholstered frame parts, drawer sides and backs, paint grade mouldings and cores that will be covered by veneer.
Its weakness is color. The heartwood is creamy to yellowish with green, gray and sometimes purple streaks, and it turns brown with light. Under paint none of that matters. Under clear finish or stain it does, so most buyers use poplar only where the surface will be painted, covered or hidden.
Properties
| Janka hardness | About 540 lbf (2,400 N) |
| Density at 12 percent moisture | About 455 kg/m³ |
| Shrinkage, green to oven dry | About 4.6 percent radial, 8.2 percent tangential |
| Grain and texture | Straight grain, fine to medium even texture with small pores |
| Color | Creamy white sapwood. Heartwood pale yellow to olive green with gray or purple mineral streaks, browning with light. |
| Heartwood durability | Not durable. Indoor use only. |
| Steam bending | Moderate |
Typical published values for wood at about 12 percent moisture. Individual boards and panels vary.
Grades you will see on a quote
The grade decides how much clear wood you pay for. Name it on the RFQ and ask for photos of what the factory calls that grade.
- FAS and FAS 1 Face (NHLA)Long, wide, clear boards. Poplar yields high FAS percentages, so clear long stock is relatively affordable.
- No. 1 Common (NHLA)Shorter clear cuttings. The usual grade for painted components and frame parts cut to length.
- No. 2A Common (NHLA)More knots and stain. Used for hidden frame parts and pallets.
- Sap or white poplarSorted for pale sapwood on the face, for products with a light clear finish. Priced above unselected.
- Paint gradeA trade description, not an NHLA grade: mineral streaks and green heartwood allowed, open defects not allowed. Ask for the written rule.
- Frame stockLower grade poplar sold for hidden upholstery frames and crating, with knots and wane allowed where they do not weaken the part.
Where poplar works
Products and parts where it earns its price, and where another material is the better buy.
Painted furniture
Cabinets, beds, tables and case parts with a solid paint finish.
Upholstered furniture frames
Rails, posts and corner blocks, often combined with plywood. Light and holds staples.
Drawer sides and backs
Light, stable enough and easy to machine for dovetail and dado joints.
Paint grade mouldings and trim
Casing, base, crown and panel mouldings that will be painted on site.
Cores and hidden parts
Cores for veneered parts and inner frames where weight and cost matter.
Carved and CNC routed painted parts
Machines cleanly and holds detail well enough for painted carvings.
Where it is a poor fit
- Clear finished or lightly stained show parts. Green heartwood and mineral streaks show, and the color shifts to brown over time.
- Table tops, floors or chair seats that take heavy wear. Poplar dents easily.
- Outdoor products. Poplar decays when wet.
- Parts that need strong screw holding in end grain. Use inserts, dowels or a harder species.
In the factory
How poplar behaves in machining, gluing, finishing and drying. These points explain most price and quality differences between quotes.
- MachiningMachines, routes and shapes cleanly and fast with low tool wear. Dull cutters leave a fuzzy surface.
- GluingGlues very well with PVAc and urea adhesives.
- FinishingPaints very well after a sealer or primer. Stains blotchy and unevenly because of its varied color.
- FasteningHolds nails and staples well for upholstery. Pre-drill near ends to avoid splits in thin parts.
At each process step
- 02Rough millingYields well and cuts easily. Heartwood ranges from cream to green and purple, so it is sorted for paint grade or stain grade.
- 04Planing and mouldingMachines easily and holds a crisp profile when knives are sharp. Turns fuzzy when they are not. Common for paint grade mouldings.
Hardness compared
Poplar against the other solid woods buyers ask about. Hardness matters for tops, floors and parts that take knocks. For legs, frames and hidden parts, stability and price usually matter more.
- Hard maple1,450
- Beech1,450
- White oak1,360
- Ash1,320
- Red oak1,290
- Yellow birch1,260
- Acacia1,100
- Teak1,070
- Black walnut1,010
- Rubberwood980
- Cherry950
- Radiata pine710
- Poplar540
How to specify poplar
Example RFQ lines you can adapt.
- Yellow poplar, NHLA No. 1 Common or better, paint grade: mineral streaks and green heartwood allowed, no open knots or splits, kiln dried to 6 to 9 percent.
- Poplar upholstery frame parts, frame stock grade, sound knots allowed away from joints and staple lines.
- Poplar paint grade crown moulding, finger-jointed allowed, primed white, lengths 2.4 to 4.8 m.
What to check on samples
Approve one sample in writing and keep it as the reference for every shipment.
- Open knots, splits and wane on painted faces against your limit
- Fuzzy grain or raised grain after priming
- Telegraphing of mineral streaks or knots through the paint on a finished sample
- Dents on edges after packing and transport
- Moisture readings on finished parts
Alternatives to poplar
When price, supply or the use case points elsewhere.
- MDFSmoother and cheaper for flat painted panels and profiled doors. Heavier and weaker at edges and screws.
- Radiata pineA low cost plantation softwood for painted mouldings and frames, often finger-jointed.
- RubberwoodHarder than poplar at a similar or slightly higher price, for painted or stained furniture.
- BasswoodEven softer and paler, for carving and painted parts that need a very uniform surface.
Products often made in poplar: furniture components, turned parts and legs, cabinet doors and fronts, millwork and mouldings, wood packaging and boxes, pallets and crates.
Product lines in poplar: sofa frames, dovetail drawer boxes, furniture legs, wood dowels, Shaker cabinet doors, primed finger-jointed mouldings, stair parts, retail display fixtures, wooden wine boxes.
Questions about poplar
Related guides:
- Upholstered Furniture Frames: Wood Species, Joints and Specs to Request
- Architectural Millwork Manufacturer Guide for Commercial Projects
- Choosing a Wood Finish for Manufactured Wood Products
Reference: Wikipedia, Liriodendron tulipifera
Why is poplar called a paint grade hardwood?
It machines and paints cleanly at a low price, but its green heartwood and mineral streaks look uneven under a clear finish. Under paint the color does not matter.
Is poplar a hardwood?
Yes, botanically. Yellow poplar is a broadleaf tree. It is soft for a hardwood, with a typical published Janka hardness of about 540 lbf, much softer than oak or maple.
Can poplar be stained?
It can, but it blotches and the green heartwood shows through light stains. A gel stain or toner helps. For stained products most buyers choose a different species.
Is yellow poplar the same as European poplar?
No. Yellow poplar is the tulip tree, Liriodendron tulipifera. European and Asian poplars belong to the Populus genus, which is softer and is mostly used for plywood, packaging and pallets.
Other temperate hardwoods
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