LARKSPUR Giant Imperial Mix

1. Plant type & timing

Type: Cool Season Annual

Height: 90–120 cm (tall flower spikes)

Best planting time:

Cool climates: Autumn, Late winter–early Spring or Autumn

Mild Warm climates: Autumn–early winter (best results)

Temperature preference: cool to mild; dislikes extreme heat

2. Site selection:

Light: Full sun in cool climates part shade in warm climates (morning sun, afternoon shade ideal)

Airflow: Important to prevent fungal issues

Shelter: Protect from strong wind (flower spikes can be tall)3. Soil preparation

Drainage: Excellent drainage is essential

Soil type: Well draining, moderately fertile soil. pH: Slightly acidic to neutral (≈ 6.0–7.0)

Before planting: Mix in well-rotted compost Avoid fresh manure or overly rich nitrogen feeds

3. Planting spacing

Space plants 30–cm (12 in) apart

Crowding = weak stems and disease

4. Watering

Keep soil evenly moist during establishment. Once established, water deeply but do not overwater. Avoid wet foliage (water at soil level)

5. Feeding

At planting: light application of balanced slow-release fertiliser.

During growth: Optional liquid feed every 3–4 weeks. Avoid high nitrogen → floppy growth

6 Staking (recommended for cutting)

Stake early before stems elongate. Use thin bamboo stakes or a grow-through support. Especially important in windy areas

6. Flowering & cutting

Flowering time: Late spring–early summer (often earlier than traditional foxgloves)

For cutting: Cut when ⅓–½ of bells are open. Cutting the main spike often encourages side shoots.

Deadheading: Improves appearance and may extend bloom period

8. Frost Tolerance & Protection

Minimum Temperature: Hardy to light frost (approx. –5 °C)

Frost Notes: Young seedlings benefit from protection during severe or prolonged frost

Mulching: Apply a light mulch to regulate soil temperature and retain moisture

9. Common problems & prevention

Powdery mildew / leaf spot:→ Improve airflow, avoid overhead watering Floppy stems:→ Too much nitrogen or too much shade

Heat stress:→ Afternoon shade in warm climates

⚠️ SafetyAll parts are toxic if ingestedWear gloves if you have sensitive skinKeep away from pets and children

 

If unsatisfied with your seedling plugs on delivery please send photos to enquiries@growitaustralia for consideration of refund within 24 hours of delivery receipt.

I cannot be held responsible for damages and delays caused during shipping

It is your responsibility to understand your own soli conditions and weather conditions suitability for planting

Seedlings are shipped Express Australia post to ensure the quickest delivery possible. 

Shipping is calculated at checkout rot give you an idea of what to expect 1- 72 plugs > $20, >72 plugs $30. Orders over 5kg will be split up for delivery to keep costs down