Name: Cassia siamea/Siamese senna seeds 1kg
Brand: Shanghai Touchhealthy seeds shop
SKU: T77
Price: 120.00 USD
Availability: InStock

Description

Plump and full Cassia siamea seeds keep high germination rate and stable vitality. Also named ironwood tree, it is a tropical evergreen arbor of legume family, famous for ultra-hard solid timber that is difficult to cut with axes. It grows rapidly with straight tall trunk and compact crown, clusters of bright yellow small flowers bloom continuously from summer to winter, forming gorgeous golden canopy with strong ornamental value.

This tree is a typical thermophilic positive species, extremely heat-resistant, drought-resistant, barren soil tolerant and alkali-resistant, also resistant to urban exhaust and air pollution. It can adapt to seasonal long dry climate, and its deep developed root system effectively consolidates hillside soil to reduce water and soil loss. Saplings grow quickly, and young trees can blossom and bear pods steadily 3–5 years after planting. It is widely used for tropical and subtropical barren mountain reforestation, large-scale fuelwood forest base building, urban roadside street trees, windbreak shelterbelts, courtyard flowering landscape trees and high-value solid timber plantation. It adapts to various soil types, prefers deep loose well-drained neutral to slightly alkaline loam. Low-lying land with long-term water accumulation must be strictly avoided to prevent root rot and growth stagnation. Daily maintenance is extremely low-cost, only ensure full sunlight supply, timely drainage in rainy seasons and annual thin organic fertilizer topdressing, a multi-purpose tree integrating flowering viewing, firewood supply, timber production and ecological protection.

Planting Instructions

Soil Preparation
Mix ordinary garden soil, coarse river sand and decomposed organic fertilizer evenly to make loose breathable planting substrate. Adopt raised seedbeds for sowing to accelerate rainwater discharge and eliminate ponding. Slightly alkaline sandy loam is the most suitable, overly hardened heavy clay soil will slow seedling growth.
Seed Pre-treatment
Cassia siamea seeds have hard compact seed coat causing physical dormancy, no need for long-term cold moist sand stratification. First take out seeds from dry pods, screen out shriveled and immature particles. Use 60–70℃ hot water to soak seeds, let water cool down naturally, then change clean water to soak continuously for 24–72 hours until seeds fully absorb water and slightly expand. Fresh newly harvested seeds have the best germination effect; germination activity drops sharply after long-term storage.
Sowing Method
Carry out strip sowing on seedbeds, bury seeds 1–1.5cm deep in moist soil, cover thin fine soil on surface and gently compact top layer, water thoroughly once after sowing. Keep proper spacing during seedling thinning. After seedlings grow multiple pairs of compound leaves, transplant them into nutrition bags for container cultivation, greatly improving survival rate of field large-area afforestation. Sowing in spring after temperature stably rises gets the highest emergence rate.
Germination Condition
Keep substrate slightly moist without standing water, optimal germination temperature ranges from 22℃ to 32℃. Concentrated seedling emergence will finish within 15–30 days after sowing. Cover breathable straw or plastic film before germination for moisture retention, uncover covering regularly for ventilation to avoid high-humidity seedling damping-off disease.
Daily Maintenance

Watering Frequency

Water once every 2–3 weeks under normal growth state; replenish water once every 3–5 days in continuous high temperature and drought summer; stop watering completely in rainy days and drain all accumulated water thoroughly.

Drought Tolerance

Moderate to strong drought resistance. After root system fully established in the second year, it can survive long seasonal dry periods with almost no supplementary irrigation.

Pest & Disease Prevention

Main common issues: root rot induced by overwatering, leaf mildew under high humidity environment, leaf-eating caterpillars and spider mites nibbling foliage.

Control methods: Strictly control watering volume to keep soil permeable; prune dense inner branches to enhance air circulation for mildew prevention; manually remove caterpillars or apply low-toxicity organic pesticide; spray diluted neem oil to repel spider mites.

Other routine care: Full sunlight all year round is mandatory, shaded environment leads to thin saplings and poor flowering performance. Trim messy lateral branches in dormant season to cultivate straight main trunk. Apply diluted balanced compound fertilizer twice in spring and summer every year to boost height and thickness growth.

Specification

Plant Name: Siamese Senna / Ironwood Tree
Botanical Name: Cassia siamea (Senna siamea)
Plant Type: Heat-loving fast-growing tropical evergreen timber flowering tree
Mature Height: 10–20 Meters
Fruiting Period: Seed pods mature in spring, seedlings bloom and fruit in 3–5 years
Germination Temperature: 22–32℃
Growing Temperature: 2℃ ~ 38℃, easily damaged by frost below 0℃
Light Requirement: Full Sun
Soil: Deep loose well-drained neutral to slightly alkaline loam, prohibit long-term waterlogging
Planting Difficulty: Easy
Core Features: Ultra-fast growth, bright yellow long-term flowering, super hard valuable timber, strong drought and alkali resistance, ideal for southern fuel forest, windbreak and landscape greening

FAQ

Q1: Can Siamese senna survive cold winter in northern China?

A1: Cannot tolerate frost and freezing weather at all. It is a purely tropical tree, only suitable for outdoor planting in Guangdong, Guangxi, Yunnan, Hainan, Fujian and other warm southern regions.

Q2: Is cold sand stratification needed for seed treatment?

A2: Not required. Only hot water soaking to soften hard seed coat can break dormancy and achieve normal germination.

Q3: What are the two biggest planting taboos?

A3: Long-term soil water accumulation causes fatal root rot; long-term shaded environment results in weak growth and no blooming.

Q4: What are the main application values of mature Cassia siamea trees?

A4: Hard wood for furniture and craft making, high calorific value branches for firewood and charcoal, yellow flower clusters for ornamental street trees, developed root system for hillside anti-erosion protection.

Q5: Is it friendly to novice growers?

A5: Very suitable for beginners in suitable climate zones. The key points are hot water seed soaking before sowing, well-drained seedbed and full sunlight growing environment.

Cassia siamea/Siamese senna seeds 1kg