HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
---|---|---|---|---|---|
8516210000 | Doc | 55.0% | CN | US | 2025-05-12 |
8545904000 | Doc | 55.0% | CN | US | 2025-05-12 |
8545194000 | Doc | 55.0% | CN | US | 2025-05-12 |
9615902000 | Doc | 38.1% | CN | US | 2025-05-12 |
9615906000 | Doc | 41.0% | CN | US | 2025-05-12 |
8543708000 | Doc | 55.0% | CN | US | 2025-05-12 |
8419819080 | Doc | 37.5% | CN | US | 2025-05-12 |
8419899580 | Doc | 59.2% | CN | US | 2025-05-12 |
8514400000 | Doc | 55.0% | CN | US | 2025-05-12 |
8514908000 | Doc | 55.0% | CN | US | 2025-05-12 |
8439991000 | Doc | 55.0% | CN | US | 2025-05-12 |
8439995000 | Doc | 55.0% | CN | US | 2025-05-12 |
8436100000 | Doc | 55.0% | CN | US | 2025-05-12 |
8436100000 | Doc | 55.0% | CN | US | 2025-05-12 |
6307908500 | Doc | 35.8% | CN | US | 2025-05-12 |
6307908995 | Doc | 37.0% | CN | US | 2025-05-12 |
Seedling Heat Mat
A seedling heat mat, also known as a propagation heat mat, is an electrically-heated pad used to warm the soil for improved seed germination and root development of seedlings.
Material
- Heating Element: Typically resistive heating wires or carbon fiber elements embedded within the mat.
- Surface Material: Commonly made from polypropylene or polyethylene plastic, chosen for its durability, water resistance, and insulating properties. Some mats have a more robust, textured surface for better heat distribution and cleaning.
- Outer Layer: Usually a waterproof plastic coating to protect the electrical components from moisture.
- Wiring: Electrical cord with a standard plug. Some mats include a built-in thermostat controller with a sensor probe.
Purpose
The primary purpose is to provide consistent bottom heat to the root zone of seedlings. This accelerates germination, promotes faster growth, and increases the success rate of starting plants from seed, particularly in cooler climates or during colder seasons.
Function
Heat mats work by converting electrical energy into heat. The heat radiates upwards and warms the soil, creating an optimal temperature environment for seed sprouting and early root growth. Bottom heat encourages roots to grow downwards, resulting in stronger, healthier plants.
Usage Scenarios
- Seed Starting: Most commonly used in indoor seed starting setups.
- Propagation: Used for rooting cuttings, especially for plants that require warmer temperatures for successful rooting.
- Cloning: Essential in cloning operations to maintain a consistent and warm environment for root development.
- Warm-Loving Plants: Beneficial for starting plants that originate from warmer climates.
- Extending Growing Season: Allows gardeners to start seeds earlier in the spring or later in the fall.
Common Types
- Standard Heat Mats: Rectangular mats of various sizes, designed to fit standard seed trays.
- Round Heat Mats: Suitable for individual pots or smaller containers.
- Heat Mats with Thermostat: Include a built-in thermostat to regulate temperature and prevent overheating. These are highly recommended for consistent results. Thermostats can be analog or digital.
- Heavy-Duty Heat Mats: Constructed with thicker materials and more robust heating elements for increased durability and longer lifespan.
- Waterproof Heat Mats: Designed for use in high-humidity environments or with direct watering.
- Capillary Heat Mats: Distribute heat more evenly across the surface, often used for larger propagation setups.
Seedling heat mats are typically used for germination and maintaining optimal temperatures for young plants. They provide warmth to the soil, promoting faster and more consistent growth. Based on the provided reference material, the following HS codes may be relevant:
- 8516210000: This HS code covers electric instantaneous or storage water heaters and immersion heaters; electric space heating apparatus and soil heating apparatus. Given that seedling heat mats are a form of electric soil heating apparatus, this is a potentially relevant classification. The tax details are: Basic tariff: 0.0%, Additional tariff: 25.0%, Additional tariff after 2025.4.2: 30.0%, Total tariff: 55.0%.
- 8419899540: This HS code covers other machinery, plant or equipment designed for cooling. While primarily for cooling, the reference material indicates this chapter includes equipment for the treatment of materials by a process involving a change of temperature. If the mat includes temperature control features beyond simple heating, this could be considered. The tax details are: Basic tariff: 4.2%, Additional tariff: 25.0%, Additional tariff after 2025.4.2: 30.0%, Total tariff: 59.2%.
- 8514400000: This HS code covers other equipment for the heat treatment of materials by induction or dielectric loss. If the seedling heat mat utilizes induction or dielectric loss for heating, this code may apply. The tax details are: Basic tariff: 0.0%, Additional tariff: 25.0%, Additional tariff after 2025.4.2: 30.0%, Total tariff: 55.0%.
It is important to note that the final classification will depend on the specific features and construction of the seedling heat mat. If the mat includes complex temperature control systems or utilizes specialized heating methods, further investigation may be required.