When To Start Picking Rhubarb

You should start picking rhubarb in early to mid-spring, typically from April through June, once the stalks have reached a good size and the leaves have fully unfurled.
 
Knowing when to start picking rhubarb is all about balancing that sweet, tangy harvest with keeping the plant healthy.
 
If you’re new to growing it, figuring out when to start picking rhubarb can feel a little tricky because unlike other crops, you don’t wait for a color change or a soft touch.
 
Instead, when to start picking rhubarb really comes down to the calendar, the size of those stalks, and the age of your plant.
 
In this post, we’ll dig into the best timing, the signs you should look for, and a few pro tips so you know exactly when to start picking rhubarb like a seasoned gardener.
 
Let’s get into the good stuff.

When to Start Picking Rhubarb: The Core Timing Rules

When to start picking rhubarb depends on a mix of seasonal cues and how long your plant has been in the ground.
 
Generally speaking, you’ll begin picking rhubarb about two to three months after the plant first emerges in early spring.
 
The very first rule is patience: never harvest any stalks during the plant’s first year after planting.
 
With that in mind, here’s what determines when to start picking rhubarb each season.
 

1. Wait Until the Stalks Are Long Enough

A simple way to figure out when to start picking rhubarb is to check the length of the stalks.
 
You’re looking for stalks that are at least 10 to 15 inches long from the base to the leaf.
 
If they’re still short and skinny, they’re not ready, so give them more time.
 
Thin stalks signal a young plant or an early season that hasn’t built up enough energy yet.
 
Once those stalks are thick and sturdy, that’s your green light for when to start picking rhubarb.
 

2. The Leaf Size Tells You a Lot

The leaves are another big clue for when to start picking rhubarb.
 
When the leaves have fully opened and are roughly the size of your hand or larger, the stalk is mature enough to harvest.
 
Small, crumpled leaves mean the stalk is still growing and needs more time on the plant.
 
As a rule of thumb, when to start picking rhubarb is once you see those big, broad, umbrella-like leaves spreading out.
 

3. Plant Age Matters for the Harvest Window

If you’re wondering when to start picking rhubarb from a brand-new plant, the answer is simple: don’t.
 
In its first year, rhubarb needs every single leaf to build a strong root system, so skip the harvest completely.
 
In the second year, you can start picking rhubarb very lightly, taking just a few stalks from each plant.
 
By the third year and beyond, the plant is mature enough for a full harvest season that usually lasts about eight to ten weeks.
 

4. Stop Picking When Stalks Get Thin or Flower Stems Appear

Knowing when to start picking rhubarb also means knowing when to stop.
 
Once the weather heats up in late June or July, the stalks naturally become thinner and tougher.
 
If you see a tall flowering stalk shoot up, that’s a signal that the harvest window is closing.
 
You should stop picking rhubarb then because the plant is shifting its energy toward seed production instead of stalk growth.
 

Best Practices for Picking Rhubarb at the Right Time

Once you’ve nailed down when to start picking rhubarb, you want to make sure you’re doing it correctly.
 
Proper technique keeps the plant productive and prevents disease, so let’s break down the essentials.
 

1. Pull, Never Cut

When you start picking rhubarb, always grasp the stalk near the base and give it a firm, twisting pull.
 
This cleanly separates the stalk from the crown, which is better for the plant than cutting with a knife.
 
Cutting leaves a stub that can rot and invite pests.
 
A good pull also removes the entire stalk without damaging the nearby buds.
 

2. Always Remove the Leaves

Right after you start picking rhubarb, trim off the leaves immediately.
 
The leaves contain high levels of oxalic acid and are toxic to humans and pets.
 
Don’t toss them in the compost pile where animals might munch on them.
 
Instead, discard them or add them to a hot compost bin that breaks them down safely.
 

3. Harvest in the Morning

The best time of day to start picking rhubarb is in the early morning.
 
At that point, the stalks are fully hydrated and crisp because the plant has had all night to take up water.
 
Afternoon harvesting can give you slightly wilted or limp stalks, especially on hot days.
 
Morning picking keeps your rhubarb snappy and stores much better.
 

How Often Can You Pick Rhubarb Each Season?

So, you know when to start picking rhubarb, but how frequently should you head out to the garden?
 
You can harvest every couple of days during the active season, as long as you leave at least half the stalks on each plant.
 
Never strip the plant completely bare because it needs leaves to photosynthesize and store energy for next year.
 
A good rhythm is to pick rhubarb twice a week, taking two to three stalks per plant each time.
 
This steady approach extends your harvest window and keeps the plant producing.
 

1. Watch Those Flower Stalks

If you spot a flower stem forming, cut it off right away so it doesn’t steal energy from stalk growth.
 
This is separate from the decision of when to start picking rhubarb, but it’s just as vital for a long season.
 
Removing flower stalks early encourages the plant to keep pushing out edible stems.
 

2. Feed After Heavy Harvesting

Once you’ve been picking rhubarb for a few weeks, give the plant a boost.
 
A side dressing of compost or a balanced fertilizer in midsummer helps replenish the nutrients you’re taking away.
 
This extra feeding supports strong regrowth so you can keep harvesting a bit longer.
 

Signs That It’s Too Late to Start Picking Rhubarb

Just as there’s a right time to begin, there are clear signs you’ve missed the ideal window for picking rhubarb that year.
 
If the stalks look woody and dry, they’re past their prime.
 
Another sign is a bitter taste, which develops when temperatures stay above 80°F for extended periods.
 
Finally, if the stalks are hollow or stringy, you’ve waited too long.
 
In that case, stop picking rhubarb entirely and let the plant rest until next spring.
 

So, When Should You Start Picking Rhubarb?

You should start picking rhubarb in early to mid-spring, typically from April through June, once the stalks reach 10 to 15 inches long with fully opened leaves.
 
But remember, you should only start picking rhubarb from plants that are at least two years old.
 
By pulling stalks gently, removing leaves right away, and never taking more than half the plant, you’ll enjoy a steady supply.
 
And when summer heat kicks in and the stalks thin out, it’s time to stop picking rhubarb and let the crown recharge.
 
Hope this guide clears up exactly when to start picking rhubarb so you can enjoy those tangy pies and sauces all season long.
 
Happy harvesting.