Light
Most bromeliads want bright, indirect light. UF/IFAS says they grow well indoors in any spot with bright, diffused light but not direct sun, and Clemson says they need indirect sunlight to grow well and flower. The genera vary, though. NC State notes that Guzmania lingulata grows in part to full shade and does well under artificial lights, so it suits a north or east room. Neoregelia sits at the other end: Clemson says it does best in strong light and that too little light turns its colored leaves green.
UF/IFAS gives a simple way to read the plant. Leaves that grow long, thin and greener mean too little light for that variety; leaves that come out short, thick and paler mean too much. Adjust the distance from the window until new leaves match the shape and color the plant had when you bought it. On the Illinois Extension scale, medium to bright light, about 150 to 300 foot-candles, covers most of the group.
| Range | Medium light to bright light, best in bright light |
|---|---|
| Foot-candles | 150 to 300 fc (1,615 to 3,229 lux) |
| Windows | East, West, North · no direct sun |
| Sources | Clemson Cooperative Extension; UF/IFAS Extension; North Carolina Extension Gardener Plant Toolbox; University of Illinois Extension |
Water
Water a bromeliad from the top, into the cup. Clemson says the tank should be kept filled at all times, and NC State's Aechmea profile is more precise: about an inch of water in the central cup, removed and replaced once a month so it does not stagnate and breed insects. Pour carefully so the overflow does not soak the soil, and flush the cup periodically by filling it, tipping the plant to empty it, and filling it again. That rinse also stops mineral salts from building up on the leaves.
The potting mix is a separate question, and here the advice varies by genus. Clemson's general rule is to water well and let the soil dry before watering again, because bromeliads are prone to root rot if it stays wet. NC State says to let the top half of the mix dry for the flaming sword, while for the urn plant it asks for a consistently moist, well-drained medium. Neoregelia does best grown on the dry side. Letting the top half dry is a safe middle course for a mixed collection.
In winter, water the mix less, as NC State advises for Aechmea, and keep the cup only lightly filled if the room drops toward 60°F, since cold standing water in the crown invites rot. Earth stars (Cryptanthus) have no cup to speak of; Clemson says to let their soil dry only slightly between waterings.
| Rule | When the top half of the pot is dry: keep water in the central cup, and let the top half of the potting mix dry before watering the mix again |
|---|---|
| Winter | Water the mix less in winter, as NC State advises for Aechmea, and keep only a little fresh water in the cup when the room is cool. |
| Watch for | Clemson: fill the tank without soaking the soil; bromeliads are prone to root rot if the mix stays wet. |
| Flush the cup with fresh water regularly so it does not stagnate or collect mineral salts; NC State changes Aechmea cup water once a month. | |
| Genera differ: Aechmea likes the mix lightly moist, Neoregelia does best on the dry side, earth stars should dry only slightly. | |
| Sources | Clemson Cooperative Extension; North Carolina Extension Gardener Plant Toolbox |
Soil and pH
Bromeliad roots are mostly holdfasts, so the mix exists to anchor the plant and drain fast. UF/IFAS suggests one part peat, one part bark and one part coarse sand; NC State recommends bromeliad or orchid mix and says air must reach the roots. Clemson goes further and notes that for epiphytic types the potting mix is almost insignificant, which is why many can be mounted on wood. Earth stars are the exception: they are terrestrial and need rich, organic soil.
| Mix | A loose, fast-draining epiphyte mix, such as equal parts peat, bark and coarse sand, or an orchid or bromeliad mix; earth stars want richer, organic soil. |
|---|---|
| Ingredients | peat or coir, orchid bark, coarse sand or perlite |
| Sources | Clemson Cooperative Extension; UF/IFAS Extension; North Carolina Extension Gardener Plant Toolbox |
Humidity
Clemson states that bromeliads need humid air to prosper and that most houses are not moist enough, recommending frequent misting. Guzmania and Vriesea are the most demanding: Clemson describes them as needing constantly moist air and good air movement, and NC State suggests a humidifier or a tray of wet pebbles for Guzmania. Bathrooms and kitchens with bright windows suit them well. Silver-scaled and stiff-leaved types such as Aechmea tolerate drier rooms better.
Temperature
Clemson gives 60°F to 85°F as the range in which bromeliads survive and grow well. NC State is a little narrower for individual species: 60°F to 80°F for the flaming sword and 65°F to 75°F for the urn plant. Normal room temperatures suit the whole group. Keep them off cold windowsills in winter, since NC State lists cold exposure as a cause of brown leaf tips on Aechmea, and away from heaters that dry the air.
| Minimum | 60°F (16°C) |
|---|---|
| Maximum | 85°F (29°C) |
| Humidity | Likes humid air. Clemson says bromeliads need humid air and that most houses are too dry; Guzmania and Vriesea are the most demanding. |
| Sources | Clemson Cooperative Extension; North Carolina Extension Gardener Plant Toolbox |
Fertilizer
Bromeliads need little food. Clemson recommends fertilizer at half strength or less during the summer months, and also suggests misting the leaves with diluted liquid fertilizer, since the leaves absorb nutrients. For earth stars it gives a monthly feeding from mid-spring through early fall. For the rest of the group, the University of Illinois Extension general rule of one feeding every one to three months in the growing season, here at half strength, is enough. Neoregelia in particular should be underfed: Clemson warns that frequent fertilization turns its leaves green.
| When | Summer, or mid-spring to early fall for earth stars, every 4 to 13 weeks, none in winter |
|---|---|
| What | Liquid fertilizer at half strength or less, poured on the mix or misted onto the leaves, half strength |
| Sources | Clemson Cooperative Extension; University of Illinois Extension |
Work out the dose for your watering can with the fertilizer dilution calculator →
Repotting
Bromeliads rarely need a bigger pot. Clemson says Neoregelia does best underpotted, and UF/IFAS notes their limited root systems serve mainly as anchors. Repot only when a heavy plant keeps tipping over, when pups crowd the base, or when the mix has broken down and stays soggy. Do it in spring or summer, the season Clemson recommends for indoor plants, using a pot just large enough to hold the plant upright, and weight a light pot with a heavier outer container.
- Pups crowd the base of the old rosette
- The plant tips over in a pot too light for it
- The mix has broken down and stays soggy