Zone 4: Submerged Pond PlantsSubmerged pond plants grow in deeper water over 16? (40 cm) deep. They have long stems and their leaves usually (but not always) float on the surface of the water.
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Zones are calculated using the zipcodes, and vary based on the distance from the origin of a shipment to its destination. Here's how that roughly breaks down: Zone 1: 1-50 miles. Zone 2: 51-150 miles.