Monkshood. An upright perennial with finely dissected, dark green leaves. Spikes of pale-yellow, hooded flowers from August to late September. Height 1m. Spread 40cm. Part shade. Moist, fertile, well-drained soil. Hardy. CAUTION toxic if eaten/harmful via skin.
Aconitum ‘Yellow Submarine’ is a striking upright perennial known for its pale yellow, hooded flower spikes and finely divided foliage. Moreover, it is perfect for adding height and late-season interest, while Aconitum ‘Yellow Submarine’ is especially well suited to shaded borders and woodland-style planting.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: First, plant in spring when the soil is workable and beginning to warm, as this allows roots to establish effectively.
Early Autumn: Alternatively, early autumn planting enables Aconitum ‘Yellow Submarine’ to settle in and develop a strong root system before dormancy.
Site Selection
Sunlight: Ideally, choose a position in partial shade; this helps protect foliage and ensures steady growth.
Soil: In addition, fertile, moist but well-drained soil is essential. Incorporating compost or organic matter will greatly benefit Aconitum ‘Yellow Submarine’.
Planting Instructions
Prepare the Hole: Begin by digging a hole twice the width and the same depth as the root ball.
Soil Preparation: Next, mix compost or well-rotted organic matter into the excavated soil.
Planting: Then position the plant so the crown sits level with the soil surface.
Backfill: Gently firm the soil around the roots.
Watering After Planting: Finally, water thoroughly to help Aconitum ‘Yellow Submarine’ establish quickly.
Watering Requirements
Growing Season: During active growth, keep the soil evenly moist; consequently, this supports healthy foliage and flowering.
Dry Periods: Furthermore, regular watering is important, as Aconitum ‘Yellow Submarine’ prefers consistent moisture levels.
Feeding
Spring: To begin the season well, apply a balanced fertiliser in early spring.
Mid-Season: Additionally, a light supplementary feed can help maintain vigour in Aconitum ‘Yellow Submarine’ throughout its flowering period.
Pruning
Deadheading: For best appearance, remove faded flower spikes regularly.
Seasonal Care: Likewise, trimming back stems after flowering will help maintain a neat and tidy shape.
Mulching
Spring: Apply a layer of organic mulch in spring to retain moisture and suppress weeds.
Ongoing Care: As a result, soil quality improves, supporting the long-term health of Aconitum ‘Yellow Submarine’.
Supporting the Plant
Growth Habit: Although stems are generally sturdy, they may benefit from light staking in more exposed areas.
Placement: Therefore, position toward the back of borders where height and structure can be fully appreciated.
Final Tips
Overall, Aconitum ‘Yellow Submarine’ is a hardy and visually striking perennial that brings structure and colour late in the season. However, it is important to note that Aconitum is toxic if ingested or harmful if handled improperly, so care should always be taken. With the right conditions and thoughtful care, it will thrive and return year after year with a reliable display.
Select options 
Reviews
There are no reviews yet.