Turnip plant

Growing in Pots, Balconies & Indoors

turnip can be grown in a deep container on a patio or balcony, but it is really an outdoor crop – it needs a good depth of soil and cool, bright conditions to swell a proper root, and the grower does not list it as an indoor houseplant.

Quick Details

• Container Size: A deep pot, at least about 25-30 cm (10-12 in) deep, so the root can run straight down
• Indoor Suitability: Not a houseplant; a sunny sill only raises seedlings or a few leaves, not a usable root
• Best Spot: full sun – an open, sunny balcony or patio
• Soil & Drainage: Loose, stone-free, deep mix; free-draining so roots do not fork or rot
• Watering in Pots: Keep evenly moist – steady moisture gives smooth, mild roots; drying out then flooding splits them

Indoors & On the Windowsill

• Houseplant limits: Not a houseplant; the root needs full outdoor light, cool temperatures and depth to develop – indoors you get leaves at best.
• Windowsill use: A sunny sill can raise seedlings or a handful of baby leaves, but the root will not size up in a room.
• Overwintering: Hardy roots can sit in the pot through cold weather; otherwise lift and store them cool and dark, or keep pots in a sheltered, unheated spot.

On a Balcony or Patio

• Light & wind: Full sun and cool, even conditions; heat and dry spells make it bolt and turn woody. Pots dry fast against warm walls, so check them often.
• Practicalities: Depth matters more than width – a deep pot prevents forked, stunted roots. Mind the drainage runoff.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage: A deep container (at least 25-30 cm deep) with strong drainage holes; skip a standing-water saucer to avoid root rot.
• Potting mix: A loose, stone-free, well-aerated mix so roots run straight; avoid fresh lumpy manure, which forks them.
• Feeding: Feed lightly – too much nitrogen gives leaf at the root’s expense; a balanced liquid feed replaces what leaches out.
• Between crops: Sow fresh into refreshed mix each season rather than keeping old plants going.

Bloom & Edible Flower Guide

Quick Details

• Bloom Season: Summer
• Time to First Bloom: Grown as an annual but biennial to flower — turnips bolt after winter cold, or sooner if young plants are chilled or stressed
• Flower Appearance: Small four-petalled yellow flowers on upright clusters (racemes)
• Edibility: Edible — the buds, flowers and tender flowering tops are eaten raw or cooked, with a peppery mustard flavor

Detailed Blooming Overview

Turnips are grown for their swollen roots, which are lifted before flowering. If a plant is carried over winter it behaves as a biennial, bolting into a branching spike of small yellow cruciform flowers. The young flowering tops (turnip tops or “cima di rapa”) are a traditional green in their own right.

Flower Characteristics

• Small four-petalled (cruciform) yellow flowers on upright racemes.
• Followed by slender seed pods (siliques) if left to mature.

Bloom Care & Thinning

• Managing the bloom: Unless you want to save seed, thinning out the flower stalks keeps the plant’s energy in the root; alternatively, pick the young flowering tops to eat.
• Pollination: Pollinated by bees and butterflies.

Bloom Health & Protection

• Cabbage aphids: Grey-green aphids often cluster on flowering shoots and buds; a strong jet of water, insecticidal soap or neem oil keeps them in check.
• Cabbage white caterpillars: These can graze buds and open flowers — a Bacillus thuringiensis (Bt) spray is a targeted, low-impact option.