How to Grow and Care for Monkey Flowers: Essential Guide

How to Grow and Care for Monkey Flowers
16 min reading time

Welcome to our comprehensive guide on how to grow and care for monkey flowers! Whether you’re a seasoned gardener or a beginner, our tips and techniques will help you cultivate these stunning flowers with ease. Monkey flowers are known for their vibrant blooms and unique characteristics, making them a popular choice for gardeners all over the world. In this guide, we’ll cover everything you need to know about growing and caring for monkey flowers, from selecting the right location to pest control and propagation techniques.

Key Takeaways

  • Monkey flowers require well-drained soil and plenty of sunlight to thrive.
  • Proper watering and maintenance are crucial for the health and vibrancy of monkey flowers.
  • Pruning and deadheading can help prolong the flowering period and maintain plant health.
  • Common pests and diseases that affect monkey flowers can be controlled with organic methods.
  • Propagation techniques such as division, cuttings, and seed sowing can help increase your monkey flower collection.

Understanding Monkey Flowers

Monkey flowers, also known as mimulus, are a genus of flowering plants native to North America, South America, and Australia. They belong to the family Phrymaceae and comprise around 150 species, ranging from annuals to perennials.

Monkey flowers are known for their showy blooms, which come in a wide range of colors, including red, yellow, orange, pink, and white. They typically bloom from late spring to mid-summer and can attract a variety of pollinators, such as bees and butterflies.

Monkey Flower Growing Guide

Before you start growing monkey flowers, it’s important to understand their preferred growing conditions and requirements. Here are some factors to consider:

SunlightMonkey flowers thrive in full to partial sunlight. They require at least 6 hours of direct sunlight a day, preferably in the morning or late afternoon.
SoilMonkey flowers prefer well-drained soil with a pH range of 5.5 to 7.5. They also need plenty of organic matter to thrive. If your soil is heavy or compacted, consider adding compost or other organic amendments to improve drainage and aeration.
WaterMonkey flowers need regular watering to keep their soil moist but not waterlogged. Avoid letting the soil dry out completely, especially during hot and dry periods. Water at the base of the plant to prevent fungal diseases from developing on the leaves.
ClimateMonkey flowers can tolerate a wide range of climates, from cool temperate to subtropical. However, some species are more frost-sensitive than others and may require protection during winter.

Now that you know the basics of growing monkey flowers, let’s move on to selecting the right location for your plants in the next section.

How to Grow Monkey Flowers: Selecting the Right Location

Monkey flowers are sun-loving plants that require full or partial sunlight to grow and flower. When selecting a spot for your monkey flowers, make sure it receives at least 6 hours of direct sunlight per day. They can tolerate some shade, but too much shade can lead to weak and spindly growth.

If you live in a hot climate, it’s best to provide some afternoon shade to protect your monkey flowers from scorching heat. On the other hand, if you live in a cooler climate, try to choose a location that receives maximum sunlight to provide your plants with the heat they need to thrive.

It’s also essential to ensure that the soil in the selected location is well-draining and rich in organic matter. Monkey flowers can’t tolerate wet feet and are susceptible to root rot, so avoid planting them in areas with poor drainage or standing water.

If you have heavy clay soil, work in some compost, sand, or perlite to improve its structure and drainage. A pH range of 6.0 to 7.5 is ideal for monkey flowers, so test your soil and amend it with lime or sulfur if necessary.

How to Grow and Care for Monkey Flowers: Preparing the Soil

Monkey flowers are not picky about soil type, but they do require well-draining soil with plenty of organic matter. Before planting, it’s important to prepare the soil properly to provide the best growing conditions for your monkey flowers.

Here are some steps to follow:

  • Test the soil pH: Use a soil test kit to determine the pH level of your soil. Monkey flowers prefer a slightly acidic soil with a pH between 6.0 and 7.0.
  • Loosen the soil: Use a garden fork or tiller to loosen the soil to a depth of at least 12 inches. This will allow the roots to penetrate deeply and help with water and nutrient absorption.
  • Add organic matter: Incorporate compost, aged manure, or leaf mold into the soil to improve its texture and fertility. Aim for a ratio of one-third organic matter to two-thirds soil.
  • Fertilize: Monkey flowers benefit from a balanced fertilizer, such as a 10-10-10 or 20-20-20 formula, applied at half the recommended rate. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowers.
  • Mulch: Apply a 2-3 inch layer of organic mulch, such as shredded leaves or straw, around the base of the plants to retain moisture, suppress weeds, and regulate soil temperature.

By following these steps, you’ll create a nutrient-rich and well-draining soil that will provide your monkey flowers with the best possible growing conditions.

Planting Monkey Flowers

Once you’ve prepared the soil, it’s time to start planting your monkey flowers. Follow these steps to make sure your plants get off to a good start:

  • Timing: Plant monkey flowers in the spring after the last frost, or in the fall before the first frost.
  • Spacing: Space plants 12-18 inches apart to give them room to grow.
  • Planting Depth: Dig a hole slightly larger than the root ball of your plant. Place the plant in the hole at the same level it was growing in its original container.
  • Covering: Fill in the hole with soil and gently tamp it down around the plant. Make sure the soil is level with the surrounding ground.
  • Watering: Water the plant thoroughly after planting to settle the soil and give the plant a good start.

Remember to water your monkey flowers regularly and avoid letting the soil dry out completely. With proper care, your monkey flowers will grow quickly and produce an abundance of brilliant blooms!

Monkey Flower Watering and Maintenance

How to Grow and Care for Monkey Flowers

Watering is crucial to the growth and health of monkey flowers, especially during hot and dry periods. Make sure to water your plants regularly, ensuring the soil is moist but not waterlogged. Depending on the weather conditions, you may need to water your monkey flowers every few days or even daily.

It’s important to avoid getting water on the leaves of your monkey flowers, as this can lead to fungal diseases. Instead, aim to water directly at the base of the plant, using a watering can or hose with a gentle spray nozzle. You can also use a soaker hose to provide slow, steady watering.

Maintaining your monkey flowers involves keeping an eye out for any issues such as pests, diseases, or nutrient deficiencies. Regularly inspect your plants for signs of damage or distress, and take appropriate action if necessary. For example, you may need to remove any yellowing leaves, treat pests with insecticidal soap, or fertilize with a balanced plant food.

In addition to regular watering and maintenance, consider applying a layer of mulch around the base of your monkey flowers. Mulching can help retain moisture in the soil, suppress weeds, and regulate soil temperature.

Monkey Flower Pruning and Deadheading

Pruning is a crucial aspect of maintaining the shape and health of your monkey flowers. It helps to remove spent blooms, promote bushier growth, and prevent diseases. Deadheading is also essential for prolonging the flowering period and encouraging more blooms to form.

The best time to prune your monkey flowers is in early spring when new growth begins to emerge. Start by removing any dead or damaged branches, cutting them back to healthy, living wood. You can also shape the plant by cutting back the tips of the branches to promote bushier growth.

When deadheading your monkey flowers, use sharp, clean shears to cut off the spent blooms just above the first set of healthy, full leaves. This will prevent the plant from wasting energy on producing seeds and encourage it to produce more flowers instead.

It’s essential to avoid over-pruning your monkey flowers, as this can lead to stunted growth or even death. Only remove a third to half of the plant’s branches each year, focusing on the oldest and least productive ones.

Remember to water your monkey flowers thoroughly after pruning to help them recover and stimulate new growth. With proper pruning and deadheading, your monkey flowers will continue to bloom profusely and look their best.

Monkey Flower Pests and Diseases Control

While monkey flowers are relatively low-maintenance plants, they are still susceptible to various pests and diseases. Here are some common issues you may encounter and how to address them:

Spider Mites

Spider mites are tiny pests that thrive in hot and dry conditions. They can cause yellowing leaves, webbing, and stunted growth in monkey flowers. To control spider mites:

  • Regularly hose down your plants to reduce the population
  • Introduce predatory mites, such as Phytoseiulus persimilis, to eat the spider mites
  • Apply a neem oil or insecticidal soap spray to the affected plants


Whiteflies are tiny, winged insects that suck the sap from plants, causing them to wilt and turn yellow. To control whiteflies:

  • Regularly hose down your plants to reduce the population
  • Introduce natural enemies, such as ladybugs, lacewings, or parasitic wasps, to eat the whiteflies
  • Apply a neem oil or insecticidal soap spray to the affected plants

Root Rot

Root rot is a fungal disease that occurs when the soil is too damp and poorly drained. It can cause yellowing leaves, wilting, and plant death in severe cases. To prevent root rot:

  • Plant your monkey flowers in well-draining soil with good aeration
  • Avoid overwatering your plants and water them only when the top inch of soil is dry
  • Apply a fungicide to the soil if you suspect the disease has already infected your plants

Powdery Mildew

Powdery mildew is a fungal disease that causes a white, powdery coating on the leaves and stems of plants. It can weaken your monkey flowers and reduce their overall health. To control powdery mildew:

  • Improve air circulation around your plants by pruning back any overcrowded foliage
  • Avoid watering your plants from above, as wet leaves can encourage the disease
  • Apply a fungicide spray to the affected plants

Note: When using pesticides or fungicides, always read and follow the instructions carefully to avoid harming your plants or the environment. Consider using organic and natural control methods when possible.

Monkey Flower Propagation Techniques

If you want to expand your monkey flower collection or share them with others, propagation is a great way to do it! There are different propagation techniques you can use, depending on the variety of your monkey flowers and your personal preferences.


Division involves separating the root clumps of a mature monkey flower plant and replanting them. You can do this in spring or fall, when the plant is dormant. Dig up the entire plant, being careful not to damage the roots. Gently pull the root clumps apart with your hands or a knife, making sure each division has a healthy portion of roots and stems. Replant each division in a prepared soil bed, water thoroughly, and keep the soil moist until the new plants are established.


Cuttings are a great way to propagate your monkey flowers without damaging the parent plant. Take stem cuttings of about 6 inches long from healthy, mature plants in spring or summer. Remove the lower leaves and any flowers or buds. Dip the cut ends into rooting hormone powder and plant them in a soilless mix or a well-draining soil. Cover the pot with a plastic bag or a clear plastic container to create a humid environment, and place it in a bright, indirect light. Keep the soil moist and mist the cuttings regularly until they root and start growing new leaves.

Seed Sowing

If you want to start your monkey flowers from seeds, you can either collect the seeds from your own plants or buy them from a seed supplier. Monkey flower seeds are small and require light to germinate, so you can scatter them on the soil surface and gently press them down. Keep the soil moist and cover the pot with plastic wrap or a clear lid to maintain humidity. Place the pot in a warm, bright location but out of direct sunlight. The seeds should germinate within 2-3 weeks. Once the seedlings have grown their first set of true leaves, you can transplant them into individual pots or a prepared bed.

How to Care for Monkey Flowers: Overwintering

How to Grow and Care for Monkey Flowers

If you live in a region with cold winters, it’s essential to protect your monkey flowers from frost damage. Here are some tips for overwintering your monkey flowers:

  • Mulching: Apply a layer of mulch around the base of your monkey flowers to insulate the soil and roots from freezing temperatures. Use a natural material such as straw, leaves, or pine needles.
  • Covering: For fragile monkey flower varieties, cover the plants with a frost cloth or blanket on nights when temperatures are expected to drop below freezing.
  • Indoor storage: If you have potted monkey flowers, consider bringing them indoors during the winter. Place the plants in a bright, cool room with consistent temperature and humidity levels.

By following these overwintering techniques, you can keep your monkey flowers healthy and thriving year-round.

Troubleshooting Common Issues

If your monkey flowers are not looking as healthy and vibrant as they should, don’t worry – there are several common issues you may encounter during their growth process. Here are some monkey flower troubleshooting tips to help you identify and resolve these issues:

  • Yellowing leaves: If you notice your monkey flower’s leaves turning yellow, it may be due to overwatering or poor drainage. Check the soil moisture and adjust your watering accordingly. If the soil is too wet, try improving the drainage by adding sand or perlite.
  • Wilting flowers: Wilting can occur due to underwatering, excessive sunlight, or root damage. Ensure your monkey flower is receiving enough water and check if the roots are healthy. If the plant is getting too much sunlight, move it to a shadier area.
  • Nutrient deficiencies: A lack of nutrients can cause stunted growth, yellowing leaves, and poor flowering. Try fertilizing your monkey flowers with a balanced fertilizer, rich in nitrogen, phosphorus, and potassium.
  • Pest infestations: Common pests that attack monkey flowers include spider mites, aphids, and whiteflies. Use organic pest control methods such as neem oil, insecticidal soap, or diatomaceous earth to keep them at bay.
  • Disease: Monkey flowers can be susceptible to fungal diseases such as powdery mildew and rust. Ensure proper air circulation and avoid overhead watering to prevent these diseases. If necessary, use fungicides to treat affected plants.

By following these monkey flower troubleshooting tips, you can address any issues that arise during the growing process and keep your monkey flowers healthy and vibrant. Remember to regularly monitor your plants and provide them with the right care to ensure their optimal growth and blooming.


Congratulations on completing this comprehensive guide on how to grow and care for monkey flowers! By now, you should have a good understanding of the unique characteristics of monkey flowers and how to ensure their healthy growth and vibrant blooms in your garden.

Remember that the key to successful monkey flower cultivation is to provide them with the right growing conditions, including the proper sunlight, soil composition, and watering techniques. By following the tips outlined in this monkey flower maintenance guide, you can create a thriving monkey flower garden that will provide you with beauty and joy for years to come.


What are Monkey Plants?

Monkey plants, also known as Ruellia makoyana, are vibrant houseplants with striking striped leaves. Native to Brazil, they’re popular for indoor cultivation due to their attractive foliage and easy care requirements.

How much sunlight do Monkey Plants need?

Monkey Plants prefer bright, indirect light. Too much direct sunlight can scorch their leaves, while too little light can cause the colors to fade.

What is the ideal temperature for growing Monkey Plants?

Monkey Plants thrive in temperatures between 60-75°F (15-24°C). They don’t do well in cold drafts or temperatures below 50°F (10°C).

How often should I water my Monkey Plant?

Water your Monkey Plant when the top inch of the soil is dry. Overwatering can lead to root rot, so it’s crucial to ensure the plant has good drainage.

Can Monkey Plants be grown from cuttings?

Yes, Monkey Plants can be propagated from stem cuttings. Simply cut a healthy stem, let it dry for a day or two, then plant it in well-draining soil.

Are Monkey Plants toxic to pets?

Monkey Plants are non-toxic to cats and dogs. However, it’s always best to keep plants out of reach of pets, as some might have a bad reaction to ingesting any plant material.

How often should I fertilize a Monkey Plant?

During the growing season (spring and summer), you can fertilize your Monkey Plant once a month with a balanced houseplant fertilizer. In fall and winter, reduce feeding to every other month.

What kind of soil do Monkey Plants prefer?

Monkey Plants prefer well-draining soil. A good mix would be equal parts peat moss, loam, and sand or perlite.

Why are the leaves on my Monkey Plant turning yellow?

Yellow leaves can be a sign of overwatering. Check the moisture levels in your soil and adjust your watering schedule as necessary. If the problem persists, it could be a sign of a nutritional deficiency.

How large do Monkey Plants grow?

Indoor Monkey Plants typically grow to about 1-2 feet tall. They are fairly slow growers, so it may take some time for them to reach their full size.

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