How to Balance pH for Erysimum: A Step-by-Step Guide

Erysimum, also known as wallflowers, are beautiful flowering plants that add vibrant colors to any garden. However, to ensure healthy growth and abundant blooms, it’s crucial to maintain the right pH balance in the soil. In this comprehensive guide, we’ll walk you through the steps to balance the pH for Erysimum, including specific instructions for DIY users.

Understanding the Ideal pH Range for Erysimum

Erysimum thrives in well-draining soil with a pH range of 5.8 to 6.2. This slightly acidic to neutral pH allows the plants to absorb nutrients effectively, promoting robust growth and vibrant flowers. When the pH falls outside this range, it can lead to nutrient deficiencies or toxicities, hindering the plant’s development.

Preparing the Growing Medium for Erysimum


To create the ideal growing environment for Erysimum, start by preparing a well-draining medium with an electrical conductivity (EC) of 0.75 to 0.80 mmhos. This ensures that the soil has the right balance of nutrients and moisture retention properties.

When choosing a liquid fertilizer, opt for a balanced formula that complements the pH and alkalinity of your irrigation water. A fertilizer with a ratio of 20-10-20 or similar works well for Erysimum.

Propagating Erysimum Cuttings

If you’re starting Erysimum from cuttings, it’s essential to stick them in the growing medium as soon as possible, preferably on the day of arrival. If you need to store the cuttings, keep them at a temperature of 45°F (7°C) for no more than 18 hours before planting.

To promote early and uniform rooting, apply a rooting hormone basal dip of 500 to 1,000 ppm indole-3-butyric acid (IBA). Low mist levels work best for Erysimum cuttings and encourage faster rooting.

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Fertilizing Erysimum for Optimal Growth

Erysimum 2

Once the roots become visible, begin fertilizing Erysimum with 50 to 75 ppm nitrogen (N). During the propagation stage, use primarily calcium nitrate and magnesium nitrate-based fertilizers, such as Cal-Mag® Plus, to prevent unwanted stretching.

As the roots develop further, increase the fertilization rates up to 100 ppm nitrogen. Periodically using a calcium-based fertilizer will help maintain optimal nutrient levels in the soil.

Watering and Irrigation for Erysimum

Erysimum prefers moderately dry soil between watering sessions. Allow the growing medium to dry out slightly, but never let the plants wilt. Regularly leach the soil to prevent the buildup of high soluble salt levels, which can harm the plants.

When Erysimum is in the flowering stage, it will require higher irrigation levels to support the increased energy demands of blooming.

Temperature and Lighting Requirements for Erysimum

During the propagation stage, maintain a soil temperature of 70 to 72°F (21 to 24°C) until roots are visible. Use bottom heat at a temperature of 70 to 72°F (21 to 22°C) for the first three weeks. Once the roots are well-developed, lower the temperatures to hold and tone the cuttings.

For optimal growth during the finishing stage, maintain night temperatures at 50 to 55°F (10 to 13°C) and day temperatures at 55 to 60°F (13 to 16°C). An average daily temperature of 55 to 60°F (13 to 16°C) is ideal.

Erysimum requires moderate to high light levels of 3,000 to 5,000 foot-candles (30,000 to 50,000 lux) for healthy growth. They do not require long days to flower.

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Pinching Erysimum for Fuller Plants

To encourage branching and create a fuller plant, pinch Erysimum as soon as the plants are well-rooted. This simple technique will maximize the plant’s potential and result in a more attractive appearance.

DIY Home Remedies for Balancing pH in Erysimum

For DIY users looking to balance the pH of their Erysimum soil, there are several home remedies you can try:

  1. Lowering pH: If the soil pH is too high (alkaline), you can use vinegar or lemon juice to lower it. Mix 1 tablespoon of vinegar or lemon juice with 1 gallon of water and apply it to the soil. Retest the pH after a few days and repeat the process if necessary.

  2. Raising pH: If the soil pH is too low (acidic), you can use baking soda to raise it. Mix 1 tablespoon of baking soda with 1 gallon of water and apply it to the soil. Retest the pH after a few days and repeat the process if needed.

Always test the soil pH before applying any home remedies and make small adjustments to avoid shocking the plants. Gradually adjust the pH over a period of 1-2 weeks to allow the plants to adapt.

Monitoring and Maintaining the pH Balance

Regularly monitor the soil pH using a reliable pH meter or test kit. Aim to keep the pH within the range of 5.8 to 6.2 for optimal growth and flowering of Erysimum.

If you notice any signs of nutrient deficiencies or toxicities, such as yellowing leaves or stunted growth, check the pH and make adjustments accordingly.

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By following these step-by-step instructions and maintaining the ideal pH range, you can ensure that your Erysimum plants thrive and produce stunning blooms throughout the growing season.