How to Make Hanging Baskets | Plant a Full, Dense Basket Fast

Making a hanging basket requires a lined container, quality potting mix, and a deliberate mix of upright, bushy, and trailing plants arranged so the basket looks full within weeks.

For the full breakdown, see our best Inexpensive Hanging Baskets guide.

A hanging basket that goes from bare to spectacular in one season starts with the right liner and a planting strategy that leaves no dead spots. Whether you are using a wire frame or a solid plastic pot, the same core method applies. The payoff is a display that draws eyes upward all summer.

Which Liner and Container Work Best

The liner you choose controls both drainage and moisture retention, and the wrong one makes maintenance harder. Wire baskets need a liner; solid containers with drainage holes can skip it, but adding one helps with water management.

The moss must be snugly packed with no gaps, or soil leaks out during every watering. The Illinois Extension notes that pre-formed coir basket liners work well and simplify the job — just press them into place.

If you use a solid plastic basket with pre-drilled holes, skip the moss and go straight to media. For wire baskets, the liner does double duty: it holds soil in and helps the basket look full faster when you cut side holes and plant through them.

How to Plant for a Full Look Fast

The secret to a dense hanging basket is planting the sides, not just the top. The RHS recommends cutting holes in the liner at varying heights, starting at least 4 inches up from the base, and inserting plants through those openings. Illinois Extension gives the same advice: cut side holes, fill the basket to the level of each hole, insert the plant, then continue filling upward.

For the top, use the classic thriller-filler-spiller arrangement. Place one tall focal plant in the center (the thriller), surround it with mounding bushy plants (the filler), and tuck trailing plants around the rim so they spill over (the spiller). Shorter or trailing plants go at the edge; taller ones stay in the center. Fill with potting mix until it sits just below the rim.

Water slowly and thoroughly until it runs out the drainage holes. Then place the basket in filtered sunlight for two to three weeks while the roots establish — Purdue’s guidance for strong root growth before hanging in full sun.

Plant Selection Rules

Choose between seasonal annuals for a single-season burst or hardy perennials for a longer display. The RHS advises deciding this first because it drives every other choice — watering frequency, sun exposure, and how much work you want to put in.

Mixing all three types is more important than the exact basket size or brand. A basket planted with only upright plants looks sparse for weeks. One with all three fills out fast.

Watering and Fertilizer That Keep the Basket Full

Hanging baskets dry out faster than ground beds. The RHS says they may need watering daily during hot summer weather; Illinois Extension says start with every other day and increase as temperatures rise. Water until it runs from the drainage holes, and never let the pot sit in standing water.

For fertilizer, combine a slow-release granular mix at planting time with a half-strength liquid feed every two weeks. This keeps the display attractive through the whole season without burning roots. Check the top inch of soil before watering — if it feels dry, soak it.

Common Mistakes to Skip

The most frequent failure is using too little liner — soil leaks out the first time you water. Pack the moss thick and check for holes. Overfilling the basket makes watering difficult because the top dries out while the bottom stays soggy. Leaving the basket in full sun without adjusting watering frequency guarantees crispy plants by mid-July.

Planting only the top is the biggest wasted opportunity. Side planting costs a few extra plants but cuts the time to a full-looking basket in half.