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Single Mix China Aster Flowers

Mix · Asteraceae

Single Mix China Aster is an upright annual cut flower with daisy-like blooms in pink, purple, blue, and white shades. Plants usually grow 1-3 feet tall and flower from midsummer into fall when started early and given good airflow. It is especially useful where gardeners want late-season nectar, cut stems, and cottage-garden color, but it should be kept away from leafhopper pressure that can spread aster yellows. Key facts: 70–80 days to maturity, 6+ hours of sun, 8–12 " spacing. Can be grown in containers with care (3+ gallon minimum).

Updated April 19, 2026 · Backed by 5 cited sources
Overview

At a Glance

The essentials first: timing, light, spacing, seed-starting, container fit, and overall size.

Days to maturity
70–80 days
Sun
6+ hours
Full Sun, 8+ Hours
Spacing
8–12 "
between plants
Seed start
6–8 weeks
before transplant
Container
Possible
Needs 3+ gal minimum
Height
1–3 ft
at maturity
Planting window

Zone Planting Guide

Switch zones to see whether this plant is a strong fit, what frost timing looks like, and any extra notes worth planning around.

This card updates instantly with viability, frost timing, and any planting notes for your selected zone.

Resilience

Plant Health

Stress tolerance, resistance notes, and the most common problems to watch for as plants mature.

Tolerance
Heat: Moderate Cold: Low Drought: Low

Common Issues

Aster Yellows

Cause: Leafhopper-vectored phytoplasma causes malformed yellowed growth

Prevention: Use insect netting or row cover early and remove infected plants promptly

Fusarium Or Root Rot

Cause: Warm wet soil and poor drainage

Prevention: Rotate beds and maintain drainage

Leaf Spot

Cause: Crowding and overhead irrigation

Prevention: Space well and water at the base

Feeding & picking

Nutrition & Harvest

How hungry the plant is, what ripe harvest looks like, and how long the crop keeps after picking.

Feeding
Nutrition
Feeding intensityMedium feeder
RecipesRoot Drench, Worm Castings Topdress
Timing
Harvest

Cut when outer ray florets have just opened and stems are firm, or let heads mature fully for seed.

Expected yield0.1–0.2 lbs/plant
Storage7 days — Fresh cut stems last about a week in clean water; dry heads fully for seed saving.
Plant relationships

Companion Planting

Helpful neighbors can support growth or deter pests. Keep antagonistic plants separated to reduce stress and competition.

Avoid planting near
Herb Fennel
What you'll need

Growing Supplies

Based on Single Mix China Aster's growth profile -- recommendations matched to this variety's specific requirements.

Drip irrigation / soaker hose kit

Every gardener benefits from putting water at the root zone instead of on the leaves, because drip and soaker systems reduce foliar disease pressure by limiting leaf wetness and soil splash. A quality kit should include a backflow preventer, filter, pressure reducer, and UV-resistant tubing.

Source: Iowa State University Extension; Colorado State University Extension; UMass Extension

Soil test kit

A soil test gives a baseline for pH and nutrient status so gardeners can add only what the soil actually needs. Prioritize a mail-in or lab-affiliated kit whenever possible because extension guidance notes that laboratory testing is more accurate than instant readers.

Source: University of Maryland Extension; Purdue Extension; Montana State University Extension

Quality bypass pruners

Extension guidance favors bypass designs because they make cleaner, closer cuts on living tissue than anvil types. Look for hardened steel blades that can be sharpened, a comfortable grip, and a cutting capacity matched to real home-garden stems.

Source: University of New Hampshire Extension; Iowa State University Extension; Purdue University Extension

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Research

Sources

Reference material and extension guidance used to build this growing guide.

seed_catalog Seeds Nowreference Johnny's Selected Seedsreference Farmhouse Flower Farmuniversity Colorado State University Extensionuniversity Penn State Extension
Internal links

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