bottom heat

American  

noun

Horticulture.

1. heat artificially applied to a container in which plants are grown in order to induce their germination, rooting, or growth.

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Etymology

Origin of bottom heat

First recorded in 1880–85

Example Sentences

Pepper seeds may take two weeks to germinate without bottom heat to the seed tray.

From Washington Post • Mar. 2, 2021

Cuttings or “pipings” are also inserted in rich but very gritty soil in cold frames, or in beds with gentle bottom heat in greenhouses.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" by Various

Allow no diminution of bottom heat, and keep up a warm, moist atmosphere.

From In-Door Gardening for Every Week in the Year Showing the Most Successful Treatment for all Plants Cultivated in the Greenhouse, Conservatory, Stove, Pit, Orchid, and Forcing-house by Keane, William

The seeds are sown singly in rich, sandy soil in small pots early in February and plunged in a bottom heat.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" by Various

Cuttings taken off now will root readily in a gentle bottom heat.

From In-Door Gardening for Every Week in the Year Showing the Most Successful Treatment for all Plants Cultivated in the Greenhouse, Conservatory, Stove, Pit, Orchid, and Forcing-house by Keane, William