Grow Well Guides

Mandevilla

Also known as Rock Trumpet, this delightful climber erupts each summer with vibrant, trumpet shaped flowers in a variety of colours, including whites, pinks, and reds. This well-behaved twining vine will continue to bloom until the first frosts of autumn.

Planting Calendar

Summer
Autumn
Winter
Spring

Mandevilla are best planted during the hotter months of the year, they are usually available instore during the summer months.

Prepare

Position

Mandevillas enjoy a sheltered position protected from cold winds. They flower better when planted in full sun but can tolerate a little shade.

Soil

When planted into the ground Mandevilla likes a free draining soil that is rich in organic matter. To improve the organic content in your soil, break up the soil and add Kings Compost and Kings Sheep Pellets then mix together well. When growing in containers, plant into Kings Container mix. This mix contains added water storage crystals and Saturaid, two products that help maintain moisture in the soil.

Plant

When planting into the ground, gently tap the plant out of its pot. Dig a hole twice the depth and width of the plants root ball. Mix Kings Compost into your existing soil at a 50/50 ratio, add Sheep Pellets and then mix together well. Back fill the hole with this soil, so that when planted the top of the plant’s roots sit level with the surrounding ground. Firm the soil down gently and water in well with Aquaticus Organic Garden Booster. In heavier clay soils, where drainage is likely to be an issue, plant onto a raised mound and sprinkle Gypsum Clay Breaker into the bottom of the hole, this helps slowly condition the soil and will help to break down the clay. When planting into containers plant in Kings Containers mix, as this has water retention crystals in it, which will help in keeping the soil moist. Firm the soil down gently and water in well with Aquaticus Organic Garden Booster.

Care

Watering

Watering is essential especially in the first year of planting to allow the roots to get well established. Water slowly allowing the water to sink down into the roots, rather than allowing it to run off the top of the soils surface. Add Saturaid into the soil at planting as this will help channel the water deep down into the root zone.

Feeding

When planted in the ground liquid feed every month with Aquaticus Garden Booster, from Spring through to the end of Autumn, this encourages root growth and increases the microbial activity in the soil. Monthly applications of Kings Sheep Pellets will help with soil conditioning and plant health. If planted into a containers feed with Kings Liquid Fast Food along with monthly applications of Aquaticus Organic Garden Booster this encourages strong roots and a healthy immune system.

Protecting

Being a tropical plant Mandevilla needs protecting from cold winds and frosts. Cover with frost cloth if frost are likely.

Mulching

Mulch around the base of the plants (make sure that the mulch does not come into direct contact with the stem of the plant) with Living Earth More than Mulch. Mulching helps to reduce weeds as well as aiding the soil to retain moisture.

Spraying

Spray with Groventive Garden to control insects if required.

Pruning

Prune only to remove and damaged stems or to maintain shape. Pinching back the growing tips will help to keep the plants bushy.

General Care

When using sprays, chemicals or fertilisers always read the label and follow the instructions. Apply sprays in the evening to avoid harming beneficial insects.

Beginner Tip

Provide a trellis, wire or climbing frame to support the plant as Mandevillas can grow vines up to 5m.

Expert Tip

To ensure success when growing Mandevilla, drainage and protection from winds is the secret.

Tip

Pinching out growing tips in early spring will help create a full bushy plant.

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