The complete guide to cell culture plates
The five culture plate families, what each is for, and which labs live in them.
Culture plates split by surface before they split by format, because the surface decides what can live in the well. This guide walks the five families with their applications, then the choice sequence. The surfaces page goes deeper on treatments, and the formats page on sizes and seeding.
Standard treated plates: the adherent workhorse
Plasma treated polystyrene, sterile, clear, in every format from 6 to 384. Primary applications: routine culture, dose response and cytotoxicity assays, transfection, endpoint viability work. Who uses them: effectively every cell lab. The deciding facts are format (by growth area) and consistent treatment; this is the default against which the other families are exceptions.
Untreated and suspension plates: cells that should not stick
Plain hydrophobic polystyrene, sold for work where attachment is the failure mode. Primary applications: suspension cell culture, embryoid body and stem cell work where cells must stay unattached, cultures grown on a coating the lab applies itself. Who uses them: hematology, stem cell, and suspension-line groups. The same plate that ruins an adherent culture is the correct tool here.
Coated plates: for cells that need more than treated plastic
Plates pre-coated with extracellular matrix proteins or attachment factors: collagen, poly-D-lysine, fibronectin, and similar. Primary applications: primary cells, neurons and other demanding lines that attach weakly or differentiate on standard treated surfaces; assays where the coating itself is a variable to hold constant. Who uses them: primary culture and neuroscience labs, and anyone whose line failed on the standard surface. Coated plates cost more and store more carefully; buy them for a demonstrated need.
Spheroid and low-attachment plates: growing in 3D
Round (U) bottom wells with ultra-low attachment surfaces, so cells aggregate with each other instead of the plastic and form spheroids. Primary applications: tumor spheroid drug testing, 3D culture models, embryoid body formation at scale. Who uses them: oncology and 3D model groups. The deciding facts are the low-attachment coating quality and well geometry, which set spheroid uniformity.
Imaging and high content plates: built for the microscope
Black walls with clear, thin bottoms (plastic film or glass), flatness held to a focal plane. Primary applications: live cell imaging, high content screening, fluorescence assays where the cells are read in place. Who uses them: imaging cores and screening groups. White clear-bottom variants serve luminescence endpoints in culture. The trade is price and fragility against optical quality.
Choosing, in order
Surface first (treated, untreated, coated, or low-attachment, by what the cells must do), format second (by growth area and replicate count), optics third (clear for routine, black or white clear-bottom when the plate is read in place), and brand last. Most culture failures blamed on technique are the first choice made wrong, which is why this guide, and this site, start there.
Cell culture plate families at a glance
| Family | Surface | Primary use |
|---|---|---|
| Standard treated | Plasma treated polystyrene | Adherent culture and assays |
| Untreated / suspension | Plain polystyrene | Suspension cells, embryoid bodies |
| Coated | Collagen, poly-D-lysine, fibronectin | Demanding and primary cells |
| Spheroid / low attachment | Ultra-low attachment, U bottom | 3D spheroids and aggregates |
| Imaging / high content | Treated, thin clear bottom, black walls | Microscopy and in-plate reading |
All families are sold across the standard formats; growth area per well is tabulated on the formats page.
Related guides
Common questions
Treated or untreated for a new cell line?
For an adherent line, start treated; it is the surface adherent cells are expected to attach to. Untreated is for suspension lines and for work where attachment is unwanted. If a line is documented, its culture notes settle the question before habit does.
When do I need a coated plate?
When cells attach weakly, detach under assay handling, or behave differently on standard treated plastic: many primary cells and neurons are the classic cases. Try standard treated first; move to coated when attachment or phenotype says so, not by default.
What plate should I use for spheroids?
A round bottom, ultra-low attachment plate. The U shape gathers the cells together and the low-attachment surface keeps them off the plastic, so one spheroid forms per well. Flat treated plates grow monolayers, not spheroids.
Can one plate do culture and assay?
Often, yes, and that is the point of the 96 well culture plate: grow in it, dose in it, and read the endpoint in it. Imaging and luminescence endpoints may still move the work to a black or white clear-bottom plate grown in parallel.