They are quite at home in large pots and planters, as they like to be slightly root-bound. These plants can be grown outdoors in the Summer but they need to be brought in before the frost and kept in a warm position during the winter. Inside warm conservatories they have been known to flower for up to 10 months.
They can handle the temperature dropping lower but they will lose their leaves and take longer to establish in the spring. If grown in a conservatory, they need to be planted in good quality compost and a granular fertilizer should be added to encourage new healthy growth. In some parts of the UK it has been possible to successfully grow Bougainvillea outside all year round.
This is mostly in the southern parts of the UK in counties such as Cornwall and some parts of London where the conditions are generally warmer and winters more mild. They need a dry protected site in well drained soil. However trying to grow one outside is always a risk and they can be killed at any time by cold winter weather. If your Bougainvillea needs re-potting then this is the time to do this.
Once your plant is growing nicely around April start to water freely and feed with a high in nitrogen feed. When your Bougainvillea start to produce bracts you need to change to a balanced feed which you should apply weekly. Once the risk of frost has passed, usually around the beginning of June move the plant outside to a sunny location and water frequently.
If you grow Bougainvillea in pots then use soil based compost such as John Innes 3 and only pot on when they have become heavily root bound. Bougainvillea actually like to have tight roots and should only be potted on into the next pot size up, so be careful not to go too big. Bougainvillea will flower all summer if cared for correctly, firstly ensure they are grown in full sun and kept warm. When the bracts are looking well with a good colour, they benefit from being moved to a slightly cooler location still in full sun but also protected from direct sun with a little shade.
This will help prolong the colorful bracts and keep them flowering for longer, ensure you also feed with a balanced fertiliser to encourage more flowers.
Do not use the same high in nitrogen feed as this will encourage foliage growth. Bougainvillea will flower up to 3 times a year and this can be encouraged by feeding again with the high in nitrogen feed when the bracts have dropped to encourage another flush.
When the next lots of bracts show good colour again, change to a potassium feed. DO NOT compress the roots. Re-pot using John Innes Ericaceous compost. In temperatures below 40 degrees Fahrenheit, the bougainvillea leaves and bracts may wilt. In temperatures below 32 degrees Fahrenheit, damage is much more likely.
The extent of the damage depends on the length of time the plant stays below 32 degrees Fahrenheit and how far temperatures drop. Answer: Bougainvillea blooms twice per year: spring and fall or early winter. The colorful bracts will fade when spent, then will brown and drop to the ground. Question: I have my young bougainvillea in a pot, and will bring it inside for the winter.
One of the best flowering climbers or shrub can grow on porch, arch, pergola and wall. Can be also grown as a stand alone bush. Bougainvillea are hardy plants. Bougainvillea is classified as mildly toxic to dogs. The most common side effect of a dog eating bougainvillea are gastrointestinal symptoms including nausea, vomiting or diarrhea.
Around mid-April, start feeding your Bougainvillea weekly with a high-nitrogen feed. Once the bracts start to colour, switch to a high-potash feed. Once the bracts drop off, switch back to a high-nitrogen feed to encourage a second flush of flowers.
Flowering stops in early autumn. After this, stop feeding your Bougainvillea and water less often, perhaps once or twice a month. Prune Bougainvilleas in late winter or early spring before they start to grow, to keep them to the size you want.
Tie the shoots back to a trellis or other support framework. Around the Garden Centre Aquatics Centre. Garden plant of the moment: Bougainvillea.
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