Radish Sparkler Seeds

Radish Sparkler produces scarlet globes with white tips and a peppery crunch, with a quick 20-35 day harvest window.

Grow it successfully: Read the Sparkler Radish Grow Guide.

Quick Grow Facts

• Plant Type: Cool-season annual root vegetable
• Scientific Name: Raphanus sativus
• Cultivar: Sparkler
• Seed Form: Raw seed; “raw” does not prove untreated status, so inspect the received packet for any lot-specific warning
• Crop Outcome: Crisp scarlet globe with a distinct white tip
• General Sowing Time: Cool-season succession sowings; use the regional windows in the guide
• Position: Full sun in cool weather; light afternoon protection only during an unexpected hot spell
• Sow Depth: 3 mm, according to the current packet; the old “Sun” depth field is an error
• Light for Germination: No special light trigger while covered; provide bright light after emergence
• Germination Temperature: Aim for cool soil around 15–24°C
• Pretreatment: None; do not soak, chill or scarify
• Germination: 3–10 days, according to the current packet
• Method: Direct sow in the final position; do not transplant the retained root crop
• Spacing: Packet: 10 × 10 cm; intensive row: thin promptly to about 3–5 cm where roots remain uncrowded
• Growth Form: Compact leafy rosette over a round storage root
• Harvest: 20–35 days from sowing on the current packet; pull promptly while the root is crisp

Why Grow This Variety

• Scarlet globes with white tips add two-tone colour to salads and snacks.
• A 20–35-day packet window makes this a fast cool-season crop.
• Direct sowing and prompt thinning keep the root round and uncrowded.
• Short succession rows provide repeat harvests without one large glut.

Garden Uses

Use the crisp roots in salads and sandwiches, or enjoy them fresh for their peppery bite.

Growing Notes

• Direct-sow 3 mm deep in loose, stone-free soil; do not use the old “Sun” value as a depth and do not transplant the retained root crop.
• Keep the shallow seed zone evenly moist and aim for 15–24°C soil during germination.
• Use the packet's 10 × 10 cm grid or thin an intensive row promptly to about 3–5 cm where shoulders remain uncrowded.
• Harvest from about day 20 as soon as roots reach useful size; heat, drought and delay cause pithiness, excess heat and bolting.
• Protect seedlings from flea beetles with fine mesh and rotate away from other brassicas.

Food use: The harvested root and sound young leaves are edible after washing under potable running water. Seed itself is not food. Follow any treatment warning on the received lot and use only crop controls registered for edible radish in South Africa.

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