Broccolini

Growing in Pots, Balconies & Indoors

Broccolini (tenderstem) crops generously in a good-sized pot on a sunny balcony or patio, giving slender, repeat-picking stems. It is not a houseplant, but it is an excellent container vegetable.

Quick Details

• Container Size: Medium to large – about 10-20 L (3-5 gal) per plant
• Indoor Suitability: Not a houseplant – needs full sun and open air
• Best Spot: Full sun to light shade
• Soil & Drainage: Rich, moisture-retentive but free-draining mix
• Watering in Pots: Keep steadily moist – brassicas are thirsty and pots dry fast; do not let them dry out

Indoors & On the Windowsill

• Not a houseplant: The grower marks it ‘no’ – it needs full sun and open air to form good heads, and indoors it grows leggy and will not head up.
• Grow it outside: A bright, sunny sill can raise young seedlings, but move them to a big, sunny outdoor pot to crop.

On a Balcony or Patio

• Light & wind: Give them full sun and cool, fresh air; tall types catch the wind and rock, so stake them and use a large, heavy pot. Pots dry fast in sun and wind, so water often.
• Practicalities: A balcony makes it easy to net plants against cabbage caterpillars and pigeons; large tubs are heavy when wet and drain freely, so protect the floor from runoff.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage: A 10-20 L pot with strong drainage holes; skip a standing-water saucer to avoid root rot, but keep the mix consistently moist. A large, heavy tub also stays put under tall, top-heavy plants.
• Potting mix: A rich, moisture-retentive but free-draining mix – a quality potting mix with plenty of added organic matter such as compost or well-rotted manure.
• Feeding: Brassicas are hungry plants and pots leach quickly – feed regularly through the season with a balanced or nitrogen-rich liquid feed to keep leaves growing strongly.
• Longevity: Most are grown for a single crop – refresh the mix and replant for the next sowing; if you hold a plant longer, pot it on so the hungry, thirsty roots have room.

Bloom & Edible Flower Guide

Quick Details

• Bloom Season: Spring to summer
• Time to First Bloom: In its first season – the slender flowering stems are cut young
• Flower Appearance: Small yellow, four-petalled flowers on the inflorescence
• Edibility: The tender flowering stems, buds and open flowers are all edible

Detailed Blooming Overview

Broccolini (a broccoli × Chinese-kale cross) is harvested as slender flowering stems topped with small buds. It is sweeter and more tender than broccoli and re-sprouts quickly after cutting.

Flower Characteristics

• Small yellow, four-petalled flowers on a loose inflorescence.
• Stems, buds and open flowers are all edible, mild and sweet.

Bloom Care & Thinning

• Managing the bloom: Cut the flowering stems while the buds are still tight to encourage repeated side-shoots; heat hastens flowering.
• Pollination: The open flowers are pollinated mainly by bees.

Bloom Health & Protection

• Cabbage aphids cluster in the buds. What helps: a strong water spray, an insecticidal soap or neem oil.