Growing a Pineapple from its Crown — Rooting the Leafy Top

The leafy crown on top of a pineapple is a small shoot, and given the chance it will grow its own roots and become a whole new plant — a clone of the fruit you ate. It's the classic tropical windowsill grow, slow but rewarding.

Grip the leafy top in one hand and the fruit in the other and TWIST — the crown pulls out cleanly with a little stub of core, better than cutting. Pull off any clinging fruit flesh, which would only rot.

Peel off the lowest 2-3 cm of small leaves to bare the stem — you'll often see tiny brown root buds already dotting it. Then leave the crown to dry for a day or two so the base and any wet flesh callus over and won't rot when planted.

Suspend the crown so the bare stem sits in a glass of water (leaves above the rim) in a warm, bright spot, changing the water every few days — roots grow over a few weeks. Or skip the water and plant the dried crown straight into gritty, just-moist potting mix. Keep it WARM; pineapples are tropical and hate the cold.

Once rooted, pot the crown into free-draining compost in a warm, sunny place and water sparingly — the plant drinks through its leaves as much as its roots. It slowly grows into a spreading rosette of stiff, arching leaves.

With warmth and patience — usually two to three years, and a good-sized plant — it sends up a single flower spike from the centre that becomes ONE small pineapple. After fruiting the main plant slowly dies, but it leaves side-shoots (pups) around its base that you can pot up to start again.

A pineapple is a bromeliad, and its crown is a compact rosette-shoot that behaves like a giant leafy cutting: bare its base, give it warmth and a little moisture, and the cells around the stem grow ADVENTITIOUS roots, exactly as any cutting does — the drying step first lets the cut callus so it roots rather than rots, the same care a sweet-potato slip or a succulent leaf needs. Being vegetative, the new plant is a CLONE of the fruit it came from. Two things make the pineapple its own lesson. First, it is a tough tropical CAM plant built for dry heat: its stiff leaves store water and even take in much of the plant's moisture directly, which is why you water the soil sparingly and why cold and wet, not drought, are what kill it. Second, and remarkable, is its life cycle — a pineapple plant is MONOCARPIC: it grows for a few years, flowers ONCE from the centre, ripens a single fruit, and then that main plant declines and dies, having spent everything on that one pineapple. It doesn't leave you empty-handed, though: around its base it throws OFFSETS (pups and slips) that are clones ready to grow on, so the line continues — the same offset trick a bulb or a strawberry uses. (Commercial growers hurry the once-only flowering along with a puff of ethylene gas — the trick of sealing the plant in a bag with a ripe apple, which gives off ethylene.) So from a piece of kitchen waste you get a striking houseplant, a slow science lesson in tropical plants, and — if you're patient and warm enough — your very own home-grown pineapple.