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How to Plant, Grow, and Care for Angelonia Plants

Published on
September 26, 2024
How to Plant, Grow, and Care for Angelonia Plants
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Why is bonsai training wire used, and when should I remove it?

Wiring is used to guide the branches into specific shapes and positions, allowing you to control how your tree grows. You can use aluminum or copper wire to gently bend and hold branches in place. Typically, wire should be left on the tree for a few months, depending on how fast your tree is growing. You’ll want to check regularly, though—if the wire starts to dig into the bark, it’s time to remove it before it damages the tree. Always be gentle when unwiring to avoid hurting the branches.

Why are bonsai pots so shallow?

Bonsai pots are shallow to restrict root growth and help control the size of the tree. This forces the tree to focus its energy on growing branches, leaves, and, eventually, creating that miniature look. Additionally, shallow pots aid in water drainage, which is crucial for bonsai health since waterlogged roots can easily lead to rot. Aesthetically, the small, shallow pots also highlight the beauty and shape of the bonsai itself, keeping the focus on the tree rather than the container.

How long does it take for a bonsai tree to fully grow?

Bonsai trees are all about patience. It can take anywhere from 5 to 10 years for a bonsai to be considered “mature,” and even then, they continue to grow and evolve throughout their lifespan. The slower the growth, the more intricate and beautiful the tree becomes. That said, if you’re looking for quicker results, starting with a pre-bonsai or young tree can speed up the process a bit!

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How to Plant, Grow, and Care for Angelonia Plants

angelonia flowers thriving utdoors

Alright, let's talk about one of my all-time favorite summer bloomers—Angelonia! These plants are often called summer snapdragons and are known for their tall spikes of colorful flowers, which can range from white and pink to purple and blue. They’re heat-tolerant, low-maintenance, and bloom from late spring straight through to fall—seriously, what’s not to love?

Let me just throw in a quick fun fact: the flowers of Angelonia have a mild, sweet fragrance, kind of like a whisper of perfume on a summer breeze. It’s subtle, but it’s there, adding another layer to why these plants are so delightful.

Before diving into the nitty-gritty of Angelonia care, let’s fill in some essential details:

  • Plant Type: Perennial (often grown as an annual in cooler climates)
  • Size: 12-18 inches tall, 12-14 inches wide
  • Soil Type: Well-drained, loamy or sandy soil
  • Soil pH: Slightly acidic to neutral (6.0-7.0)
  • Bloom Time: Late spring to early fall
  • Hardiness Zones: 9-11 (can be grown as an annual in zones 8 and below)
  • Native Area: Mexico, the West Indies, and South America
  • Toxicity Level: Good news—Angelonia is non-toxic, so they’re safe around pets and kids.

Best Angelonia Varieties

angelonia of different shades thriving outdoors

There are a few standout Angelonia varieties that I’ve personally had great success with, and I’d recommend them to anyone.

Angelonia angustifolia 'Serena'

This series is perfect for small garden spaces or containers as they are compact but pack a punch with their vibrant colors. I’ve grown the purple and white varieties, and they’re gorgeous. The lavender is on my wish list for next year because who doesn’t love a bit more lavender in their life?

Angelonia angustifolia 'Archangel'

If you’re looking to make a statement, ‘Archangel’ is your go-to. These plants are a bit taller and have larger flowers. I once planted the cherry red variety in a bed right by my front door, and it was like rolling out the red carpet every time I came home. The raspberry and blue colors are just as striking—I’m pretty sure my neighbors were jealous.

Angelonia angustifolia 'AngelMist'

‘AngelMist’ is the versatile one who fits in anywhere—garden beds, containers, you name it. They come in a variety of colors, including this deep, dark purple that’s absolutely stunning. I’ve used them to fill in gaps in my flower borders, and they’ve never let me down.

Planting Angelonia: When, Where, and How

So, you’ve picked out your Angelonia variety, and now you’re wondering when, where, and how to plant them. Don’t worry, I’ve got you covered.

a step by step guide on planting Angelonia infographics from seeds and from seedlings

When to Plant

Angelonia should be planted in the spring after the last frost date in your area. These plants thrive in warm temperatures, so waiting until the soil has warmed up is essential for successful growth. If you’re starting from seeds, you’ll want to get those going indoors about 6-8 weeks before the frost-free date. But if you’re like me and sometimes forget to plan ahead (oops!), picking up some healthy seedlings from the garden center is just as good.

Where to Plant:

Choose a location that receives at least 6-8 hours of direct sunlight daily. I’ve planted them in garden beds, but they’re also fantastic in containers. If you’re going the container route, place them near a sunny window or in a sunroom where they can soak up the rays

How to Plant; Step-by-Step Guide

Let’s get down to the dirt—literally. Here’s how to plant your Angelonia, whether you’re starting from seeds or seedlings.

Planting from Seeds

1. Start Indoors:

  • Timing: Begin about 6-8 weeks before your area’s last frost date.
  • Seed-Starting Mix: Fill seed trays or small pots with a good quality seed-starting mix. This is lighter and finer than regular potting soil, which helps the tiny seeds germinate better.
  • Planting the Seeds: Angelonia seeds are tiny and need light to germinate, so don’t bury them. Simply press the seeds lightly into the surface of the soil using your fingertips or a flat tool.

2. Water and Wait:

  • Moisture: Keep the soil consistently moist, but not soggy. I like to use a spray bottle to mist the surface lightly. This prevents the seeds from washing away or getting buried.
  • Covering the Tray: To maintain humidity, cover the seed tray with plastic wrap or a clear plastic dome. This creates a mini greenhouse effect, which speeds up germination.
  • Lighting and Warmth: Place the tray in a warm, bright spot. If you have a grow light, that’s ideal, but a sunny windowsill works too. Aim for a temperature around 70-75°F.
  • Germination: Patience is key here. In about 10-14 days, you should start to see tiny seedlings poking through the soil. When this happens, remove the plastic cover to prevent excess moisture and mold.

3. Transplanting Time:

  • True Leaves: Wait until your seedlings have grown their first set of true leaves (the second set of leaves that appear). This usually takes a few more weeks.
  • Hardening Off: Before moving the seedlings outdoors or to a bigger container, they need to get used to the outside conditions. Over about a week, gradually expose them to the outdoors. Start by placing them outside in a sheltered spot for a few hours each day, gradually increasing the time and sun exposure.
  • Transplanting Outdoors: When the weather is consistently warm and all danger of frost has passed, it’s time to transplant. Plant your seedlings in well-drained soil, spaced about 12 inches apart, and give them a good watering.
Planting from Seedlings

1. Prep the Soil:

  • Choose Your Spot: Whether you’re planting in a garden bed or a container, make sure you pick a sunny spot with well-drained soil.
  • Improve the Soil: Angelonia loves rich soil, so I like to mix in some compost or well-rotted manure into the soil before planting. This gives the seedlings a nutrient boost and helps with moisture retention.
  • Check the Drainage: If the soil is too heavy or clay-like, mix in some sand or perlite to improve drainage. Angelonia doesn’t like to sit in soggy soil.

2. Planting the Seedlings:

  • Digging the Hole: Dig a hole that’s slightly larger than the root ball of your seedling—about 1.5 to 2 times the size. This gives the roots room to spread out and establish themselves.
  • Positioning the Seedling: Gently remove the seedling from its nursery pot. Be careful not to disturb the roots too much. Place the seedling into the hole, ensuring it’s planted at the same depth it was in the pot. You want the base of the plant (where the stem meets the soil) to be level with the soil surface.
  • Backfill with Soil: Fill the hole back in with the soil you removed, gently pressing it around the seedling to eliminate air pockets. Be sure not to bury the stem too deep.
  • Water them In: Once planted, water your Angelonia seedlings thoroughly. This helps settle the soil around the roots and gives them a good start. Make sure the water reaches deep enough to encourage the roots to grow downward.

4. Watch Them Grow:

  • Final Check: After watering, take a step back and make sure the soil is level, the seedlings are upright, and everything looks good.
  • Ongoing Care: Your seedlings are now on their way! Keep an eye on them for the first few weeks, making sure the soil stays moist (but not soggy) until the plants are established.

Angelonia Care Guide

angelonia plant care guide infographics

Once your Angelonia plants are in the ground or containers, it’s time to focus on their care. These plants are relatively low maintenance, but meeting their basic needs will ensure they thrive and bloom all season long.

Soil

Angelonia prefers well-drained soil that is loamy or sandy. The key is good drainage, as these plants don’t tolerate soggy soil. If you’ve got heavy clay soil like I do, consider planting them in raised beds or containers. Adding organic matter like compost can help improve soil structure and fertility.

Water

While Angelonia can tolerate some drought, they’ll reward you with more blooms if you keep the soil consistently moist. During hot, dry spells, you may need to water them more frequently, especially if they’re in containers. Water at the base of the plant to avoid wetting the foliage, which can lead to disease.

Pro Tip: Water your Angelonia plants early in the day to allow the foliage to dry before nightfall, reducing the risk of fungal issues.

Temperature and Humidity

Angelonia thrives in warm temperatures and can tolerate the summer heat better than many other annuals. They prefer temperatures between 70°F and 90°F during the day and can handle slightly cooler nights. These plants also enjoy moderate to high humidity, which makes them ideal for regions with humid summers.

If you live in a cooler climate, consider growing Angelonia as annuals or bringing containers indoors before the first frost. They don’t tolerate frost and will need protection if temperatures drop significantly.

Sunlight and Location

Full sun is where Angelonia shines—literally. They need at least 6-8 hours of direct sunlight each day to really thrive. If you’ve got a spot in your garden that gets all-day sun, that’s where you’ll want to plant them. In containers, they’ll do great on a sunny patio, balcony, or porch. If growing indoors, choose a south-facing window where the plants can receive plenty of light.

Angelonia Maintenance Tips

angelonia plants maintenance tips

To keep your plants looking their best, a little maintenance goes a long way. Here are some tips to help you along the way:

Fertilizing

Angelonia benefits from regular feeding throughout the growing season. Use a balanced, water-soluble fertilizer every 4-6 weeks to encourage continuous blooming. If you’re more of a set-it-and-forget-it type, a slow-release granular fertilizer at the start of the season works too. Just remember, more isn’t always better—too much fertilizer can lead to lots of leaves and fewer flowers. Follow the package instructions and avoid applying too much fertilizer.

Pruning and Deadheading

Here’s some good news: Angelonia doesn’t need deadheading to keep blooming. But if you’re like me and enjoy a tidy garden, you can snip off spent flowers to keep the plant looking neat. Pruning back the plants by about one-third in mid-summer can also promote a bushier growth habit and more flowers.

Mulching

Applying a layer of mulch around your Angelonia plants can help conserve soil moisture, suppress weeds, and keep the roots cool. Use organic mulch like shredded bark, straw, or compost, and apply it 2-3 inches deep. Just be sure to keep the mulch away from the base of the plant to prevent rot.

Overwintering

If you live in a warm climate (lucky you!), Angelonia can be grown as a perennial. But for the rest of us, we usually treat them as annuals. However, if you’ve fallen in love with your Angelonia and don’t want to say goodbye at the end of the season, you can try overwintering them indoors. Here’s how you can do it:

  1. Bring Them Indoors: Before the first frost hits, dig up your Angelonia plants from the garden or bring in the containers. Give them a good trim to reduce their size—this will help them adapt to their new indoor environment.
  2. Choose a Bright Spot: Angelonia still needs plenty of light, even indoors. A sunny windowsill or a spot under grow lights will do the trick. The goal is to mimic their outdoor conditions as much as possible.
  3. Reduce Watering: Since they won’t be growing as actively indoors, you can scale back on the watering. Just keep the soil slightly moist and avoid overwatering.
  4. Skip the Fertilizer: Your plants won’t need any additional feeding during the winter. Just let them rest and save the fertilizer for when you move them back outside in the spring.
  5. Reintroduce Them Slowly: When spring rolls around and the risk of frost has passed, start hardening off your Angelonia plants by gradually exposing them to the outdoors again. After a week or two, they’ll be ready to return to the garden or their favorite sunny spot.

Common Pests and Diseases

Angelonia is relatively resistant to pests and diseases, but like any plant, it can occasionally face issues. Here’s what to look out for and how to handle it:

Pests

  • Aphids: These small, sap-sucking insects can cluster on new growth and flower buds and cause stunted growth or distorted leaves. I’ve had a few battles with aphids over the years, and my go-to solution is a strong spray of water from the hose to knock them off. If that doesn’t do the trick, insecticidal soap or neem oil works wonders.
  • Spider Mites: These little guys are more common in hot, dry conditions, which Angelonia thrives in. If you see yellowing leaves and tiny webs, you’ve got spider mites. A good misting of water every now and then can help prevent them, and if they show up anyway, insecticidal soap is your friend.
  • Whiteflies: Whiteflies are small, white, flying insects that can be particularly troublesome in greenhouses or indoor settings. They suck sap from the plant, leading to weakened growth. Sticky traps can help catch whiteflies, and insecticidal soap can be used to control larger infestations.

Diseases

  • Root Rot: Overwatering or poor drainage can lead to root rot, which is no fun. I’ve learned the hard way that less is more when it comes to watering Angelonia. Make sure the soil is well-drained, and if you notice yellowing leaves and wilting, let the soil dry out before watering again.
  • Powdery Mildew: This disease shows up as a white, powdery coating on the leaves and is usually due to high humidity and poor air circulation. To prevent it, plant your Angelonia in a spot with good airflow and avoid watering from above. If you see it, remove the affected leaves and treat with a fungicide.
  • Botrytis Blight (Gray Mold): This one’s a bit tricky. It appears as brown, water-soaked spots on the leaves and flowers, eventually leading to a fuzzy gray mold. It usually happens in wet, humid conditions, so keep your plants spaced out for good air circulation and remove any affected parts. Fungicides can help if it gets out of hand.

FAQs

Q: Are there any specific companion plants for Angelonia?

A: Angelonia pairs well with other heat-loving and low-maintenance plants. Consider planting them with petunias, marigolds, or lantanas for a colorful, summer display. They also look great with ornamental grasses or other annuals that enjoy similar growing conditions.

Q: Can I grow Angelonia in a vertical garden or hanging baskets?

A: Absolutely! Angelonia’s trailing varieties are perfect for vertical gardens and hanging baskets. They cascade beautifully and add vibrant color to these setups. Just ensure the containers have good drainage and provide them with plenty of sunlight.

Q: What’s the most unusual or rare variety of Angelonia I can find?

A: One of the rarer varieties is the Angelonia angustifolia ‘Blue Angel,’ which has a striking, deep blue color. It’s less common than the more standard colors but offers a unique and eye-catching hue that stands out in any garden.