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Gulmohar Tree (Delonix regia): Where It Grows in India and How to Plant It

Delonix regia

Gulmohar (Delonix regia), the flame tree or royal poinciana in English, is a summer-flowering avenue tree from Madagascar. What it looks like, where it grows in India, when it flowers, how and when to plant it, care for the first three years, and whether it is harmful.

Care in the first three years

For its first three years, a young gulmohar needs water in dry spells, a weed-free basin, protection from grazing and frost, and some early pruning to build a strong crown.

Monsoon (Jul–Sep): in year 1, plant, shape the basin and fix the guard. Weed the basin two or three times during the rains in years 1 and 2.

Post-monsoon (Oct–Nov): lay dry leaves or straw as mulch (roughly 8–10 cm is our rule of thumb), kept off the stem.

Winter (Dec–Feb): ICFRE notes that gulmohar is unsuited to places with heavy frost. In frost-prone areas such as the north-west and the northern plains, cover the sapling with jute or a straw hood on nights when IMD warns of frost or a cold wave, in its first two winters (practical guidance).

Spring (Mar–Apr): leaf fall is normal. ICRAF says that in India the tree stays leafless from about March to May, with new leaves in May or June; Plants of Rajasthan records leaf fall in March and new leaves in June.

Summer (Apr–Jun): the hardest season in hot, dry regions. As a rough starting point, water about every 3–4 days in year 1, about weekly in year 2, and in year 3 only in long hot spells, always checking the soil first.

Pruning: ICRAF describes the wood as weak and says careful pruning gives a good crown. In years 2 and 3, remove low, crossing or narrow-angled branches (practical guidance), and do not cut the top off the tree.

Pests and diseases: ICRAF records termites, shoot borers, caterpillars that can strip the leaves, and Ganoderma root rot, especially in high-rainfall areas. If you see wilting, bored shoots, mud tunnels of termites on the trunk or a bracket fungus at the base, take clear photos or a sample to your local Krishi Vigyan Kendra (KVK) or forest department, and do not spray anything without their advice.

Sources: ICFRE (2019). A Manual: Modern Nursery Techniques, species 25: Delonix regia (Boj) Rafin, p. 70; Orwa C. et al. (2009). Agroforestree Database 4.0: Delonix regia. ICRAF; Plants of Rajasthan: Delonix regia (Bojer ex Hook.) Raf. (cultivated; Kota, Bundi, Udaipur; flowering April-May)

This article was prepared with AI assistance and checked by the GreenEye team against the sources shown in each section.

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