Geranium in Zone 7A — Texas

Geraniums are a classic choice for adding vibrant color to your Texas garden, and they're surprisingly versatile. They thrive in containers or in the ground, offering a splash of beauty when the Texas heat starts bearing down. Plus, who doesn't love the satisfaction of enjoying blooms you've nurtured yourself?

Our unpredictable weather can be a challenge, but with a good start and attention to watering, you can definitely grow geraniums here. Our long growing season (around 245 days!) gives you plenty of time to enjoy their beauty.

Starting geraniums from seed indoors is doable, but be warned: they are very slow. If you want instant gratification, buying starts from your local nursery is the way to go. But if you're patient, go for it!

If you are starting from seed, aim to sow seeds indoors from late December through mid January. This gives them about 12 weeks to get a head start before transplanting. Use seed trays with a good seed-starting mix, provide warmth (a heat mat is helpful), and ensure they get plenty of light – a grow light works best. Don't forget to water from the bottom to avoid damping off. Remember, Texas springs can bring early warmth, so keep an eye on the forecast as transplant time approaches.

Transplanting geraniums outdoors should happen from late March through late April. Before you move them permanently, harden them off for about a week. Gradually expose them to outdoor conditions, increasing the time each day.

When transplanting, space them about 10-12 inches apart. Keep a close eye on the weather. We can still get some late freezes that time of year, so be ready to cover them if necessary.

Watering is key to happy geraniums, especially in the Texas heat. While they tolerate heat better than some flowers, they still need consistent moisture, but don't like to sit in soggy soil. You've got to find that sweet spot.

During the spring, when the weather is milder and rainfall is more frequent (or not!), check the soil moisture every few days. Stick your finger about 2 inches deep – if it feels dry, it's time to water. In the heat of summer, you might need to water every day or every other day, depending on rainfall and humidity. Aim for about an inch of water per week, but adjust based on your specific conditions.

Water at the base of the plant to avoid getting the leaves wet, as this can encourage fungal diseases, especially with our variable humidity. Signs of underwatering include wilting leaves and dry, crispy edges. Overwatering can lead to yellowing leaves and stem rot. To help retain moisture and regulate soil temperature, add a layer of mulch around your plants.

Pruning geraniums is simple and helps keep them blooming all season long. The main thing you'll want to do is deadhead spent flower clusters.

Just snip off the faded blooms right below the flower head. This encourages the plant to produce more flowers instead of putting energy into seed production. If your geraniums start to look leggy, pinch back the stems to encourage bushier growth. As the first frost approaches around mid- November, you can give them a final trim before bringing them indoors (if you're overwintering) or letting them go for the season.

With geraniums, you're really harvesting beauty! Expect your first blooms starting in early June and continuing through late July, maybe even longer if we have a mild fall.

While you won't be harvesting fruit or vegetables, you'll want to remove faded blooms regularly to keep the plants looking tidy and encourage more flowers. Simply snip off the spent flower heads. This keeps the plant producing new blooms throughout the season. As the first frost approaches in mid- November, you can either let the plants go or try to overwinter them indoors.

Even with the best care, geraniums can sometimes run into problems. Here are a few common ones to watch out for in Texas:

Botrytis Blight

• What it looks like: Grayish-brown fuzzy mold on leaves, stems, and flowers.
• What causes it: Humid conditions and poor air circulation. In Texas, our variable humidity can create the perfect environment.
• How to fix/prevent it: Remove affected plant parts immediately. Improve air circulation by spacing plants properly and pruning. Avoid overhead watering. A fungicide may be necessary in severe cases.

Geranium Budworm

• What it looks like: Holes in buds and flowers, often with small green or brown caterpillars inside.
• What causes it: These caterpillars feed on buds and flowers, causing damage and preventing blooms.
• How to fix/prevent it: Handpick caterpillars when you see them. Use insecticidal soap or Bacillus thuringiensis (Bt) as a preventative measure, especially during bud formation.

Edema

• What it looks like: Small, blister-like bumps on the undersides of leaves, which can turn yellow or brown.
• What causes it: Overwatering and poor drainage, especially in cool, humid conditions.
• How to fix/prevent it: Improve drainage by using well-draining soil and pots. Water less frequently, allowing the soil to dry out slightly between waterings. Ensure good air circulation around the plants.

Texas Specific Challenges: The hot-to-extreme heat, variable humidity, and unpredictable rainfall can all contribute to these problems. Be vigilant about monitoring your plants and adjusting your watering and care as needed.

Geraniums make good neighbors in the garden. Plant them near tomatoes, peppers, and corn. They deter certain pests that can bother those crops, especially budworms. Roses also benefit from geraniums as companions, as they help repel aphids and other rose pests. Avoid planting geraniums near fennel, as it can inhibit their growth.