Skip to Content

Arizona Garden in April

The sunny, warm days and cool nights of April are just about perfect for the garden and the gardener. However, this is not the time to procrastinate – warmer temperatures are coming and it’s important to prepare the low desert Arizona garden in April for the hot summer ahead. 


Low Desert Arizona Garden in April


Arizona garden in april
Snapdragons and Ranunculus in bloom

What you do in your Arizona garden in April will affect how your garden, herbs, and flowers withstand the heat of the upcoming summer. 

We garden year-round in Arizona, but we can’t grow everything all year. Take a look at what’s growing in my Mesa, Arizona garden this month, and see my list of which garden tasks to do and a list of the vegetables, herbs, and flowers to plant in your Arizona garden in April.


Disclaimer: this post contains affiliate links. See my disclosure policy for more information.


What to Grow and Plant Arizona Garden #arizonagarden #arizona #garden #garden

Vegetables growing in the low desert Arizona garden in April


Arizona garden in april
Butternut squash in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Winter squash (butternut pictured here) that was planted in March is beginning to grow and bloom. Plant summer squash through the middle of April. 

Read this article for more information about how to grow winter squash


Rainbow carrots in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

April is a great month for harvesting carrots planted in the fall. Leave carrots in the ground until ready to eat, but harvest carrots before the heat of the summer if you live in hot places like Arizona (the heat can turn them bitter). 

A tip to remember — the shorter-variety carrots are best eaten fresh, while longer carrots are more suited to storing.


Beans in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Bean seeds do best when sown directly into the soil. Plant bean seeds 1 inch deep, and space them 2 inches apart. Beans should sprout in 5 to 10 days. Like many other garden plants, beans need plenty of sun to grow properly. Keep soil moist and well-drained for happy beans.


Arizona garden in april

Time to harvest the celery from your garden. Celery doesn’t like hot temperatures and the flavor will be affected – it will become bitter. The celery will also bolt – meaning the plant’s focus turns to producing seeds. You will see a central stalk become taller and literally “bolt”. If it remains in the ground, it will flower and produce seeds. 


What to Grow and Plant Arizona Garden #arizonagarden #arizona #garden #garden

Flowers growing in the low desert Arizona garden in April


Nasturtiums in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Nasturtiums put on their big show this month. The beautiful, edible blooms are everywhere! Be sure to save seeds to share with friends and family. Nasturtiums reseed easily and once you plant them, they often return year after year. 


Poppies in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Poppies sown in the fall are beautiful during the month of April. Be sure to save seeds from your favorite blooms. Learn more about how to grow poppies in this post.


Spring flowers in bloom in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Pictured here are Vitex (chaste tree), petunias, and blue plumbago – all of which bloom and are beautiful in Arizona gardens in April. 


What to Grow and Plant Arizona Garden #arizonagarden #arizona #garden #garden

Fruit trees in the low desert Arizona garden in April


Ruby red grapefruit in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Harvest Rio Red Grapefruit (pictured here) beginning in December, up until the heat of summer

Take advantage of citrus season by juicing citrus. Juiced citrus stores well in the fridge for several weeks, and can be frozen for several months. This article shares my best tips for juicing citrus


Thin fruit trees in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

As blossoms become fruit on your fruit trees, fruit should be thinned before it is an inch in diameter. Thin fruit within about a month after full bloom. Fruit thinned later than this lessens the chance that fruit size will increase. For more information about how to thin fruit, read this article.


Citrus drop in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

April is a good time to plant citrus in Arizona. Choose the correct variety for the location and your tastebuds. 


Earligrande peaches in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Early-ripening peaches (such as Earligrande, pictured here) may be ready to pick this month. Big delicious fruit is the benefit to all that thinning you did. Enjoy the fruit of your labors, and pick them before the birds get them! 


Arizona garden in april - passionfruit fine
Passionfruit Vine

What to Grow and Plant Arizona Garden #arizonagarden #arizona #garden #garden

Herbs in the low desert Arizona garden in April


Caterpillar on dill in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Flowering dill attracts pollinators and is a great companion plant to many vegetables. 


Arizona Gardening in July #gardening #desertgardening #howtogarden

Consider planting basil next to each tomato plant. The bees and your tomatoes will thank you. This article tells about how to grow basil


Cilantro in bloom in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Cilantro bolts and flowers this month. Save seeds (coriander) to plant again and use in cooking. Read this post to learn more about how to grow cilantro



Low desert Arizona garden in April to-do list:


Potato bugs in Arizona Garden in April #arizonagardening #arizonagarden #aprilinthegarden

Potato bugs (rollie-pollies) are active this month. Read this post for tips on managing them organically.


texas mountain laurel

Genista Caterpillar on Texas Mountain Laurel. Allow for some damage or use Bt to control if infestation is severe.


Planting:


plant citrus trees in april
  • April is a good time to plant citrus trees and fig trees.
  • Fruit trees can be planted early in the month so they have time to settle in before the heat of the summer. Look for varieties which require less than 400 chill hours, have early maturing fruit, and are self-pollinating.
  • Plant cold-tolerant trees, bushes, and perennials as well as frost-sensitive plants such as lantana and hibiscus. Plant summer-flowering shrubs. Do not over-plant, be aware of mature size of plant, and space accordingly.
  • Think twice before planting cool-season annuals this month. It will be heating up soon and their time in the ground will be short. Better to plant warm-season flowers when they are available.

Guidelines for planting a landscape plant

How to grow citrus in Arizona #arizonacitrus #citrus

Questions about growing citrus? This article answers 10 questions about how to grow citrus and includes guidelines for selecting, planting, watering, and fertilizing citrus.


Watering:

watering grids
  • Check irrigation system and timer. Run system and inspect all drips and sprinklers for leaks and proper watering. I use this watering system from Garden in Minutes. (Use code Angela10 to save $10 off $100.)
  • As temperatures heat up, annual plants will need more frequent watering. Water to a depth of about 6 inches, and allow top of soil to dry out before watering again. 
  • Check containers with a moisture meter or make sure top inch or so of soil has dried out before watering. 
  • Established citrus trees should be watered once every 10-14 days. 
  • Water established fruit trees once every 7-10 days.
  • Wateruseitwisely.com is a helpful resource for landscape watering guidelines.

Pruning:


prune fruit trees
  • Prune dead branches out of trees and shrubs.  
  • Spring-flowering shrubs can be pruned lightly after they bloom, water well after pruning. 
  • If you didn’t do it in March, clean up and remove dead or damaged wood and crossing branches on citrus. 
  • Remove water sprouts from lemon trees
  • If desired, train pomegranates to a wall or prune to a manageable size. 
  • Don’t prune newly-planted trees or shrubs. 
  • Do not prune lavender, rosemary, sage or thyme
  • Prune basil, lemongrass and mint

Fertilizing:


Fertilize strawberries

Yard to do and clean-up: 


  • Thin fruit on deciduous fruit treesThis article will help explain the process. 
  • Clear out remaining cool-season vegetables
  • Collect seeds from spring wildflowers and cool-season annuals sown in October and November
  • Remove spent winter-growing annuals. Stressed plants attract pests
  • Thin warm-season annuals to keep plants from overcrowding each other. 
  • Clean up and remove dead or damaged wood and crossing branches on citrus. 
  • If you did not do it back in March, remove dead plants in yard. Look at landscape, and make note of how plants look.  
  • Apply a 2-3 inch layer of mulch around base of shrubs and trees. Mulching reduces soil temperatures and adds organic matter to the soil. 
  • Mulch, mulch, mulch!!! Compost is a great mulch and can be worked into the soil at the end of the season. 
 Arizona Garden in April
What to do for powdery mildew on grapes
Use sulfur for powdery mildew on grapes


What to plant in the low desert Arizona garden in April:


 Arizona Garden in April

Herbs to plant in the low desert of Arizona in April


Arizona Garden in April

Anise, Basil, Bay, Caraway, Catnip, Chamomile, Chives, Espazote, Fennell, French Taragon, Garlic Chives, Germander, Horehound, Hyssop, Lavender, Lemon Balm, Lemon Grass, Lemon Verbena, Marjoram, Mint, Parsley, Rue, Safflower, Sage, Winter Savory, Summer Savory, Thyme, Yarrow.


Arizona Herb Planting Guide_ A Visual Planting Guide for Low Desert Herbs

Arizona Herb Planting Guide helps you learn when to plant over 30 different herbs in Arizona, and whether to plant seeds or transplants.


Vegetables to plant in the low desert of Arizona in April


Arizona Garden in April

Plant seeds of: Armenian CucumberBeans (Lima*, Snap and Asparagus/Snake), Black-eyed Peas, Cantaloupe, Corn*, Cucumber, Edamame, Green Onions, Luffa, Malabar Spinach, Okra, Peanuts, Roselle Hibiscus, Summer Squash*.

These can also be planted from transplants: Armenian Cucumber, Cantaloupe, Cucumber, Luffa, Green Onions, Malabar Spinach, Roselle Hibiscus, Summer Squash*.

Sweet Potatoes are planted from Sweet Potato Slips.

* = plant through April 15th


Vegetable Planting Guide: A Visual Planting Guide for Low Desert Vegetables

Arizona Vegetable Planting Guide helps you learn when to plant vegetables in Arizona, and whether to plant seeds or transplants.

With 50 vegetables listed that grow well in the low desert of Arizona, you are sure to find one to try. 


Flowers to plant in the low desert of Arizona in April


Arizona Garden in April

Balsam (summer), Celosia, Coleus, Coreopsis, Cosmos, Dahlias, Dusty Miller, Four O’Clock, Gaillardia, Gazania, Globe Amaranth, Geranium, Geranium, Globe Amaranth, Impatiens, Lisianthus, Marigold, Mexican Sunflower (Tithonia), Ornamental Pepper,  Portulaca, Purslane, Sunflower, Vinca, Zinnia.


Arizona annual flowers planting guide helps you learn when to plant flowers in Arizona, and whether to plant seeds or transplants.


Would you like the low-desert planting dates for vegetables, herbs, and flowers in a convenient calendar? 

Perpetual Planting & Harvest Calendar for the Low Desert of Arizona


*PLANTING GUIDE: Each month has a planting guide (letter boards) for the vegetables, herbs, and flowers to plant in the low desert of Arizona. 

*HARVEST GUIDE: Harvest guides are the harvest photos of what it is possible to harvest each month. 

Click here to learn more


How to grow a vegetable garden in Arizona #arizonagardening #arizonagarden #desertgardening #hotweathergarden #howtogarden

Want more information about gardening in Arizona? This blog post shares 7 tips for  how to grow a vegetable garden in Arizona


If this post about gardening in Arizona during April was helpful, please share it:


Lori A Lauber

Tuesday 23rd of February 2021

Great, thanks for the info!

Lori A Lauber

Saturday 20th of February 2021

Hi Angela,

Love your website! I also live in Mesa - moved from California 2 years ago, so the information is so helpful.

I was wondering what kind of sun exposure you recommend for dahlias. I've learned the hard way that when a plant tag says full sun, that doesn't always apply to full Arizona sun.

Thanks,

Lori :)

Angela Judd

Saturday 20th of February 2021

I would definitely give them afternoon shade. I am experimenting with dahlias this year and that's where I planted mine.