This guide breaks down a reliable RuneScape 3 Herblore money-maker built around gathering Cave Nightshade and converting it into Weapon Poison++ and optionally Weapon Poison+++. It’s a great route if you want profit while training Herblore (including chasing cosmetic goals like an inverted Herblore cape), because the secondary ingredient is gathered in bulk with downtime you can fill with other skilling.

You’ll learn the requirements, what to bring, where to farm Nightshade, how to streamline banking, and when it makes sense to upgrade to Weapon Poison+++ for extra experience.

Why this method works

Weapon poisons tend to hold value because they’re consumables used across combat. The key advantage here is that you can source the main secondary ingredient yourself (Cave Nightshade), meaning you’re effectively “creating” value from time rather than paying full Grand Exchange prices for every component.

• Profit potential: Strong margins when Nightshade is self-farmed.
• Flexible pacing: Nightshade regrows, giving you downtime to do other actions.
• Good Herblore XP: Weapon Poison+++ especially gives high experience per craft.

Requirements

Quest progress: Watchtower (Skavid map access)

You need to have started Watchtower far enough to obtain the Skavid map. This map is what gives you access to the cave area where Cave Nightshade grows.

If you previously destroyed or lost the Skavid map, you can reacquire it by speaking to a guard around Yanille’s outskirts (the same general area players often pass while doing clue steps). Ask for a replacement map.

Herblore levels

• 82 Herblore: to make Weapon Poison++
• 100 Herblore: to make Weapon Poison+++

Safety and utility items

• Light source: required in the cave area
• Gloves: any basic gloves work (for safe harvesting)
• Notepaper or Grace of the Elves + porter charges: to reduce banking time

This is a gather-then-craft loop, so efficiency comes from minimizing trips and keeping your inventory useful while you wait for regrowth.

• Grace of the Elves with porter charges (best): automatically sends harvested Nightshade to the bank.
• Notepaper (budget alternative): note harvested Nightshade so you can stay longer.
• Farming cape (optional): if you have it, wear it while harvesting for extra benefits and convenience.
• One-slot “side activity” items to fill downtime (see next section).

Best “side activities” while Nightshade regrows

Cave Nightshade is harvested from multiple spawns and then needs time to regrow. Instead of standing idle, bring something you can do repeatedly without changing locations much.

• Enchanting bolts (simple, consistent, one-inventory-slot loop)
• Protein skilling (portable, low attention, good XP)
• Screening soil (especially if you have a soil box and don’t mind periodic banking)
• Any single-slot processing task you can repeat while waiting

This is where the method becomes more than “just” Herblore profit: you can stack extra XP or extra gold-making on top of the Nightshade gathering time.

How to farm Cave Nightshade (location and loop)

Getting there

With the Skavid map and a light source, head south of the Yanille lodestone and enter the cave that leads to the Nightshade area (the same cave network associated with Watchtower progress).

The harvesting route

Inside, you’ll find multiple Cave Nightshade spawns clustered together (commonly around seven pickable plants). The loop is straightforward:

• Run the small circuit and harvest every available Cave Nightshade.
• Either bank automatically via porters or use notepaper to note them.
• Wait for regrowth while doing your side activity.
• Once most (or all) have regrown, repeat the circuit.

For smoother rhythm, many players prefer waiting until the whole cluster is back before doing another full lap, rather than clicking each plant the moment it regrows.

Banking options

• Porters: the cleanest option; keeps your inventory open for side activities and reduces banking trips.
• Notepaper: works well if you don’t want to spend on porter charges, but you’ll need to bring enough paper for your session.

Once you’ve built up a stack of Cave Nightshade, it’s time to convert it into Weapon Poison++. This is typically the higher-profit step because the Nightshade you gathered becomes the main value driver.

Ingredients for Weapon Poison++

• Cave Nightshade (self-farmed)
• Coconut milk
• Poison ivy berries

Grand Exchange tips (reduce your input costs)

Coconut milk can be especially volatile. To protect your margins:

• Check the current buy/sell spread before committing to large batches.
• Place buy offers early while you’re still farming Nightshade, so supplies fill passively.
• Don’t assume mid price is accurate during spikes; slow-buying often saves a lot over time.

Poison ivy berries are usually steadier, but it’s still worth setting a reasonable buy offer rather than instant-buying thousands at once.

Production boosts (important for profit per hour)

Your effective profit improves if you produce extra doses or craft more quickly. Consider using:

• Portable well (community portable skilling locations)
• Botanist’s mask (if available to you)
• Other Herblore production boosts you already own

These boosts can add extra finished product over large batches, which matters a lot when you’re doing thousands of potions.

Upgrading to Weapon Poison+++ (optional XP-focused step)

If you have 100 Herblore, you can convert Weapon Poison++ into Weapon Poison+++. This step is often chosen for the experience per craft, even when the gold margin is smaller than staying on Weapon Poison++.

Ingredients for Weapon Poison+++

• Weapon Poison++
• Poison slime
• Primal extract

• Do it for XP: the Herblore experience per potion is high, making it feel closer to premium training methods.
• Do it when margins allow: if Weapon Poison+++ sells well above mid, the upgrade can still be profitable.
• Skip it when supplies spike: primal extract (and sometimes slime) can become annoying to buy in large volume, and buy limits can slow you down.

A practical workflow

A balanced approach is to craft Weapon Poison++ as your main profit engine, then upgrade a portion into Weapon Poison+++ when the market is favorable or when you want to push Herblore XP faster. This keeps your gold-making consistent while still taking advantage of the higher experience option.

Profit expectations and what affects your results

Your exact GP per hour will vary with market conditions and how efficiently you gather and bank Nightshade. The biggest factors are:

• How you bank: porters generally increase your hourly output.
• Your downtime usage: enchanting bolts, proteins, or soil screening can add meaningful value while you wait for regrowth.
• Coconut milk pricing: this is the input that most often swings your margin.
• Portable well access: production boosts can noticeably improve returns over long sessions.

Because this method can involve meaningful up-front supply costs (especially if you’re buying coconut milk in bulk), many players like to keep extra in-game currency on hand for smoother batch crafting. If you’re planning big gear upgrades or skilling grinds at the same time, some players also choose to supplement their bankroll with RS3 gold so they can keep offers running and avoid stalling progression.

Common mistakes to avoid

• Forgetting a light source or gloves: it slows you down immediately.
• Farming Nightshade first, buying later: place your Grand Exchange offers early so your ingredients fill while you gather.
• Instant-buying during price spikes: especially coconut milk; slow-buying often protects your profit.
• Ignoring buy limits: if you’re doing huge batches, plan ahead so you don’t get stuck waiting on primal extract or slime.

Frequently Asked Questions

Do I have to do Watchtower to farm Cave Nightshade?

Yes. You need Watchtower progress far enough to obtain the Skavid map, which is used to access the cave area where the Nightshade spawns are located.

Weapon Poison++ is usually the more consistent profit craft because it relies on your self-farmed Nightshade. Weapon Poison+++ is often chosen when you want higher Herblore XP and the upgrade ingredients are cheap enough.

What’s the best way to bank Nightshade?

Grace of the Elves with porter charges is the smoothest option. Notepaper also works well if you want a lower-cost setup.

What Herblore level do I need for this to be worthwhile?

At 82 Herblore you can start making Weapon Poison++ and see strong returns. At 100 Herblore, upgrading to +++ becomes an option if you want extra XP and the market supports it.

Can this help me avoid grinding for extra cash?

It can, because you’re gathering a valuable secondary while also training. If you still want to speed up upgrades and supplies for skilling, some players look for where to buy RS3 gold to speed up mid to late game progression so they can keep crafting without waiting on cash flow.