How-to Guide
Hanging Basket Care
The short answer
The honest watering answer: daily checks all summer, and on hot, sunny days an established basket may need water more than once a day. The RHS advises checking baskets every day in summer and watering unless the compost is already moist; Iowa State Extension confirms twice-a-day watering can be necessary in hot weather. Water slowly until it drains from the bottom.
Feed regularly — the RHS recommends liquid feeding from spring through early autumn (April to September), and Iowa State suggests a water-soluble fertilizer every 1 to 3 weeks or a slow-release granular mixed in at planting. Deadhead spent flowers so energy goes into new blooms rather than seed.
When a basket goes tired and leggy by mid-summer, don't bin it: cutting trailing plants back by one-third to one-half, then keeping up water and feed, pushes fresh growth and a second flush of flowers for the rest of the season.
Watering: the daily reality
A hanging basket is a small volume of compost holding a large volume of plant, in full sun and wind. That's why it dries faster than anything else in the garden. Check every day through summer — lift or tip the basket; if it feels light, water. Iowa State Extension notes that on hot sunny days more than one watering a day may be needed, and that the soil should never be allowed to dry completely.
Water slowly and thoroughly until excess runs from the drainage holes. If a basket has dried to the point of wilting, the RHS suggests standing a bucket underneath to catch the run-off and pouring it back through — badly dried compost sheds water on the first pass.
Feeding
Baskets exhaust their compost's nutrients quickly under constant watering. The RHS advises feeding summer bedding with a liquid fertiliser through spring, summer and early autumn (April to September), always diluted according to the label — over-strong feed damages roots. Iowa State's schedule is a water-soluble complete fertilizer every 1 to 3 weeks, favoring balanced-to-higher-phosphorus formulas over high-nitrogen ones, which push leaves at the expense of flowers.
A low-effort alternative: mix a slow-release granular fertilizer into the compost at planting, with possibly a second application mid-season. Winter baskets are the exception — the RHS says don't feed them, since soft new growth is easily damaged by frost.
Deadheading
Deadhead regularly: removing spent flowers keeps the plants' energy going into new buds instead of seed production, which is what keeps a basket flowering for months. Make it a habit while watering. Note that many modern basket varieties (including trailing petunia types) are self-cleaning and need little deadheading, and small-flowered fillers like lobelia and sweet alyssum generally don't need it at all.
The mid-summer rescue
By July many baskets look straggly — long bare stems with flowers only at the tips. The fix is a hard haircut: Iowa State Extension recommends pruning trailing plants back by one-third to one-half to promote fresh new growth and more flowers for the rest of the season. Water and feed normally afterward; expect a lull of a couple of weeks, then a rejuvenated basket that carries through to frost.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- RHS — Hanging baskets: Expert Guide — Check baskets every day in summer, watering unless compost already moist; bucket trick for wilted baskets; liquid feed April-September for summer bedding; dilute feed correctly; don't feed winter baskets; deadhead regularly to keep energy out of seed production
- Iowa State University Extension — Creating and Growing Hanging Baskets — May need watering more than once a day in hot sun; water until it drains; water-soluble fertilizer every 1-3 weeks or slow-release at planting (avoid high nitrogen); many modern varieties self-cleaning; prune trailing plants back by one-third to one-half mid-summer to renew growth and bloom