No, plants and plant assets are not current assets.
A current asset is any asset that will provide an economic benefit for or within one year. Plants are a part of the property, plants, and equipment, or PP&E, account. PP&E has a useful life longer than one year, so plants are considered a non-current asset.
Accounts receivable are funds that a company is owned by clients who have received a good or service but have not yet paid. For these funds to be a current asset, they must be expected to be received within a year. An example of accounts receivable is Google Ads which allows businesses to incur an advertising bill and collect the funds after the ad placements have been used by the business. The outstanding funds waiting to be collected will be included in accounts receivable.