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Bonita Top Blue Aster Seeds

Bonita Top Blue Aster Seeds

1363

4.2
Rated 4.2 out of 5 stars
6

The beautifully saturated purple-blue blooms of 'Bonita Top Blue' add richness and depth to any flower bed, all summer long. Sturdy, dark stems add visual contrast to bouquets and keep blooms tidy and upright in the garden. With a lengthy blooming period and exceptional vase life, China asters are a favorite of both gardeners and florists, alike! Seeds are untreated but coated to improve visibility when sowing.

$3.49
$3.49
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(~25 seeds)

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  • Variety Info
  • Sowing Info
  • Growing Info
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Variety Info

Family: Asteraceae

Native: China

Hardiness: Annual

Exposure: Full sun to part shade

Bloom Period: Summer to frost

Plant Dimensions: 24"–30" tall, 12"–18" wide

Variety Info: Fully-double, 2'' blue-purple flowers

Attributes: Attracts Pollinators, Cut Flower

Non GMO Project

Sowing Info

When to Sow Outside: 1 to 2 weeks after your average last frost date, when soil temperature is at least 65°F. Mild Climates: Sow in late summer for winter bloom.

When to Start Inside: RECOMMENDED. 6 to 8 weeks before your average last frost date. Mild Climates: Start in late summer for winter bloom.

Days to Emerge: 10–15 days

Seed Depth: ⅛"

Seed Spacing: A group of 4 seeds every 12''

Thinning: When 2" tall, thin to 1 every 12''

Your hardiness zone is

Growing Info

Harvesting: For longest vase life, harvest flower in the morning, choosing buds that have just begun to open. Change vase water frequently.

Special Care: Mulch plants (avoid mulch touching stems) to help keep shallow aster roots consistently moist. Staking may be necessary. To reduce the possibility of common diseases, avoid wetting leaves when watering, and ensure good air circulation with proper thinning and spacing.

4.2
Rated 4.2 out of 5 stars
Based on 6 reviews
Total 5 star reviews: 2 Total 4 star reviews: 3 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
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6 reviews
  • Lori M.
    Verified Reviewer
    Rated 4 out of 5 stars
    8/22/25
    Beautiful through a hot, humid late summer

    These seeds had good germination and grew into tall, narrow plants about 8" wide. Of the six, five look great. No pests or diseases despite weeks of sunny, 90+ degree days and high humidity. Most are upright but a couple are flopped over from the recent rain; probably a lightweight garden stake and string would hold them upright. They're growing in gravelly clay, which I may have amended with a few handfuls per plant of compost or bagged garden soil. No care besides watering.

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    Which best describes you as a gardener? Intermediate
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    Botanical Interests
    8/26/25

    Hey Lori,

    Thank you so much for taking the time to share your experience with our Bonita Top Blue Aster Seeds! We're thrilled to hear they had good germination and grew into those lovely tall, narrow plants - and wow, five out of six looking great through all those 90+ degree days and high humidity is really impressive! Asters can be sensitive to heat stress, so it sounds like yours are real troopers. We love that they've stayed pest and disease free even through those challenging conditions. Your tip about using lightweight garden stakes and string for the ones that flopped after the rain is spot on - those tall stems sometimes just need a little extra support, especially after heavy weather. It's great to hear they're thriving in your gravelly clay with minimal amendments and care beyond watering. Thanks for the honest feedback and we're so glad these asters are performing beautifully for you through the late summer heat! Keep on growing 🌻️

  • Sam L.
    Rated 5 out of 5 stars
    8/1/25
    Worth the wait

    Started these flowers inside in mid spring, and when the temps were right transplanted them on the deck. We've been watching them for buds, and in late July we started seeing plenty of them forming. Now they are popping out into a most beautiful bloom, with many more on the way. Very nice addition to our mountain view!

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    Which best describes you as a gardener? Intermediate
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    Botanical Interests
    8/4/25

    Hey Sam L.,

    Thank you so much for sharing your beautiful growing journey! It sounds like you did everything just right with the indoor start and careful transplanting timing. What a wonderful addition to your mountain view - we can only imagine how stunning those blue asters must look against that backdrop! Your patience and care really paid off beautifully! Keep on growing 🌻️

  • Ken S.
    Rated 5 out of 5 stars
    3/20/25
    5 Stars

    Lovely plant, switches from pale blue to deep purple and keeps the purple for months! So many blooms. Highly recommended.

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  • Jennifer Y.
    Rated 4 out of 5 stars
    9/16/24
    4 Stars

    I had great germination on entire packet. Beautiful purple blooms. Had color from these for months! Will be planting more next year but in clusters for a more full and striking visual.

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    Which best describes you as a gardener? Intermediate
  • Kim M.
    Verified Buyer
    Rated 3 out of 5 stars
    4/6/24
    3 Stars

    I'm sorry to report that these did not grow. The excessive rain interfered with many, many of my seeds. But I am certain the seed quality was not the issue.

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    Which best describes you as a gardener? Intermediate