Question:
Which of the following annuals can grow luxuriantly and produce flowers under high temperature?
(A) Zinnia
(B) Gaillardia
(C) Gomphrena
(D) Sweet william
Choose the correct answer from the options given below:
Which of the following annuals can grow luxuriantly and produce flowers under high temperature?
(A) Zinnia
(B) Gaillardia
(C) Gomphrena
(D) Sweet william
Choose the correct answer from the options given below:
(A) Zinnia
(B) Gaillardia
(C) Gomphrena
(D) Sweet william
Choose the correct answer from the options given below:
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Annuals for hot weather:
Zinnia: Loves sun and heat, blooms all summer.
Gaillardia (Blanket Flower): Very heat and drought tolerant.
Gomphrena (Globe Amaranth): Thrives in heat, excellent for summer.
Sweet William: Prefers cooler conditions, usually spring/early summer blooming, not a high-heat performer.
Zinnia: Loves sun and heat, blooms all summer.
Gaillardia (Blanket Flower): Very heat and drought tolerant.
Gomphrena (Globe Amaranth): Thrives in heat, excellent for summer.
Sweet William: Prefers cooler conditions, usually spring/early summer blooming, not a high-heat performer.
Updated On: Jul 2, 2026
- (A) and (B) only.
- (B) and (D) only.
- (A), (B) and (C) only.
- (A) and (D) only.
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The Correct Option is C
Approach Solution - 1
This question asks to identify annual flowering plants that thrive and flower well in high temperatures, typical of summer conditions.
(A) Zinnia (Zinnia elegans): Zinnias are well-known for their love of sun and heat. They are popular summer annuals that flower profusely in high temperatures.
(B) Gaillardia (Blanket Flower, Gaillardia pulchella): Gaillardias are very drought and heat tolerant. They are excellent summer-blooming annuals (or short-lived perennials treated as annuals) that thrive in hot, sunny conditions.
(C) Gomphrena (Globe Amaranth, Gomphrena globosa): Gomphrena is another heat-loving annual that produces distinctive globe-shaped flower heads throughout the summer, even in very hot weather. It is also drought tolerant.
(D) Sweet William (Dianthus barbatus): Sweet William is typically a biennial or short-lived perennial that prefers cooler weather. It flowers in spring or early summer in temperate climates and does not perform well or flower luxuriantly under sustained high summer temperatures. It is not considered a high-temperature tolerant annual. Based on these characteristics, Zinnia (A), Gaillardia (B), and Gomphrena (C) are all well-suited for growing and flowering under high temperatures. Sweet William (D) is not. Therefore, option (3) is the correct choice. (A), (B) and (C) only.
(A) Zinnia (Zinnia elegans): Zinnias are well-known for their love of sun and heat. They are popular summer annuals that flower profusely in high temperatures.
(B) Gaillardia (Blanket Flower, Gaillardia pulchella): Gaillardias are very drought and heat tolerant. They are excellent summer-blooming annuals (or short-lived perennials treated as annuals) that thrive in hot, sunny conditions.
(C) Gomphrena (Globe Amaranth, Gomphrena globosa): Gomphrena is another heat-loving annual that produces distinctive globe-shaped flower heads throughout the summer, even in very hot weather. It is also drought tolerant.
(D) Sweet William (Dianthus barbatus): Sweet William is typically a biennial or short-lived perennial that prefers cooler weather. It flowers in spring or early summer in temperate climates and does not perform well or flower luxuriantly under sustained high summer temperatures. It is not considered a high-temperature tolerant annual. Based on these characteristics, Zinnia (A), Gaillardia (B), and Gomphrena (C) are all well-suited for growing and flowering under high temperatures. Sweet William (D) is not. Therefore, option (3) is the correct choice. (A), (B) and (C) only.
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Approach Solution -2
Alternate approach - eliminate the one cool-season plant:
Sweet William (Dianthus barbatus) is the odd one out here: it is a cool-season biennial that actually needs a period of cold (vernalization) to flower well, and it performs poorly once summer heat sets in. Any answer option that includes Sweet William (D) can therefore be eliminated immediately, which rules out two of the four options in one step. Between the two remaining options, Gomphrena (globe amaranth) is also a well-documented heat- and drought-tolerant summer annual, so it belongs with Zinnia and Gaillardia rather than being left out, pointing to the option that includes all three of (A), (B) and (C).
Sweet William (Dianthus barbatus) is the odd one out here: it is a cool-season biennial that actually needs a period of cold (vernalization) to flower well, and it performs poorly once summer heat sets in. Any answer option that includes Sweet William (D) can therefore be eliminated immediately, which rules out two of the four options in one step. Between the two remaining options, Gomphrena (globe amaranth) is also a well-documented heat- and drought-tolerant summer annual, so it belongs with Zinnia and Gaillardia rather than being left out, pointing to the option that includes all three of (A), (B) and (C).
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